chore: Dotnet editor config and style. (#196)

## Summary

Add editor config and reformat files. Subsequent PR will add CI lint
check.

## How did you test this change?

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## Are there any deployment considerations?

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Author: kinyoklion

sdk/@launchdarkly/observability-dotnet/.editorconfig

@@ -0,0 +1,85 @@
+
+[*]
+charset = utf-8
+end_of_line = lf
+trim_trailing_whitespace = false
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+
+# Microsoft .NET properties
+csharp_new_line_before_members_in_object_initializers = false
+csharp_preferred_modifier_order = public, private, protected, internal, file, new, static, abstract, virtual, sealed, readonly, override, extern, unsafe, volatile, async, required:suggestion
+csharp_style_prefer_utf8_string_literals = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+dotnet_naming_rule.unity_serialized_field_rule.import_to_resharper = True
+dotnet_naming_rule.unity_serialized_field_rule.resharper_description = Unity serialized field
+dotnet_naming_rule.unity_serialized_field_rule.resharper_guid = 5f0fdb63-c892-4d2c-9324-15c80b22a7ef
+dotnet_naming_rule.unity_serialized_field_rule.severity = warning
+dotnet_naming_rule.unity_serialized_field_rule.style = lower_camel_case_style
+dotnet_naming_rule.unity_serialized_field_rule.symbols = unity_serialized_field_symbols
+dotnet_naming_style.lower_camel_case_style.capitalization = camel_case
+dotnet_naming_symbols.unity_serialized_field_symbols.applicable_accessibilities = *
+dotnet_naming_symbols.unity_serialized_field_symbols.applicable_kinds = 
+dotnet_naming_symbols.unity_serialized_field_symbols.resharper_applicable_kinds = unity_serialised_field
+dotnet_naming_symbols.unity_serialized_field_symbols.resharper_required_modifiers = instance
+dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary:none
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:none
+dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary:none
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+dotnet_style_qualification_for_event = false:suggestion
+dotnet_style_qualification_for_field = false:suggestion
+dotnet_style_qualification_for_method = false:suggestion
+dotnet_style_qualification_for_property = false:suggestion
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:suggestion
+
+# ReSharper properties
+resharper_autodetect_indent_settings = true
+resharper_csharp_insert_final_newline = true
+resharper_formatter_off_tag = @formatter:off
+resharper_formatter_on_tag = @formatter:on
+resharper_formatter_tags_enabled = true
+resharper_show_autodetect_configure_formatting_tip = false
+resharper_use_indent_from_vs = false
+resharper_xmldoc_indent_child_elements = RemoveIndent
+resharper_xmldoc_indent_text = RemoveIndent
+
+# ReSharper inspection severities
+resharper_arrange_redundant_parentheses_highlighting = hint
+resharper_arrange_this_qualifier_highlighting = hint
+resharper_arrange_type_member_modifiers_highlighting = hint
+resharper_arrange_type_modifiers_highlighting = hint
+resharper_built_in_type_reference_style_for_member_access_highlighting = hint
+resharper_built_in_type_reference_style_highlighting = hint
+resharper_foreach_can_be_converted_to_query_using_another_get_enumerator_highlighting = none
+resharper_foreach_can_be_partly_converted_to_query_using_another_get_enumerator_highlighting = none
+resharper_loop_can_be_converted_to_query_highlighting = none
+resharper_mvc_action_not_resolved_highlighting = warning
+resharper_mvc_area_not_resolved_highlighting = warning
+resharper_mvc_controller_not_resolved_highlighting = warning
+resharper_mvc_masterpage_not_resolved_highlighting = warning
+resharper_mvc_partial_view_not_resolved_highlighting = warning
+resharper_mvc_template_not_resolved_highlighting = warning
+resharper_mvc_view_component_not_resolved_highlighting = warning
+resharper_mvc_view_component_view_not_resolved_highlighting = warning
+resharper_mvc_view_not_resolved_highlighting = warning
+resharper_razor_assembly_not_resolved_highlighting = warning
+resharper_redundant_base_qualifier_highlighting = warning
+resharper_suggest_var_or_type_built_in_types_highlighting = hint
+resharper_suggest_var_or_type_elsewhere_highlighting = hint
+resharper_suggest_var_or_type_simple_types_highlighting = hint
+resharper_web_config_module_not_resolved_highlighting = warning
+resharper_web_config_type_not_resolved_highlighting = warning
+resharper_web_config_wrong_module_highlighting = warning
+
+[{*.har,*.jsb2,*.jsb3,*.json,*.jsonc,*.postman_collection,*.postman_collection.json,*.postman_environment,*.postman_environment.json,.babelrc,.eslintrc,.prettierrc,.stylelintrc,.ws-context,jest.config}]
+indent_style = space
+indent_size = 2
+
+[*.{appxmanifest,asax,ascx,aspx,axaml,blockshader,build,c,c++,c++m,cc,ccm,cginc,compute,cp,cpp,cppm,cs,cshtml,cu,cuh,cxx,cxxm,dtd,fs,fsi,fsscript,fsx,fx,fxh,h,h++,hh,hlsl,hlsli,hlslinc,hp,hpp,hxx,icc,inc,inl,ino,ipp,ixx,master,ml,mli,mpp,mq4,mq5,mqh,mxx,nuspec,paml,razor,resw,resx,shader,shaderFoundry,skin,tcc,tpp,urtshader,usf,ush,uxml,vb,xaml,xamlx,xoml,xsd}]
+indent_style = space
+indent_size = 4
+tab_width = 4

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/DefaultNames.cs

@@ -6,17 +6,17 @@ public static string MeterNameOrDefault(string meterName)
         {
             return string.IsNullOrWhiteSpace(meterName) ? MeterName : meterName;
         }
-        
+
         public static string ActivitySourceNameOrDefault(string sourceName)
         {
             return string.IsNullOrWhiteSpace(sourceName) ? ActivitySourceName : sourceName;
         }
-        
+
         public static string LoggerNameOrDefault(string name)
         {
             return string.IsNullOrWhiteSpace(name) ? LoggerName : name;
         }
-        
+
         private const string MeterName = "launchdarkly-plugin-default-metrics";
         private const string ActivitySourceName = "launchdarkly-plugin-default-activity";
         private const string LoggerName = "launchdarkly-plugin-default-logger";

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/ObservabilityConfig.cs

@@ -43,17 +43,17 @@ public struct ObservabilityConfig
         /// The LaunchDarkly SDK key.
         /// </summary>
         public string SdkKey { get; }
-        
+
         /// <summary>
         /// Function which extends the configuration of the tracer provider.
         /// </summary>
         public Action<TracerProviderBuilder> ExtendedTracerConfiguration { get; }
-        
+
         /// <summary>
         /// Function which extends the configuration of the logger provider.
         /// </summary>
         public Action<LoggerProviderBuilder> ExtendedLoggerConfiguration { get; }
-        
+
         /// <summary>
         /// Function which extends the configuration of the meter provider.
         /// </summary>

sdk/@launchdarkly/observability-dotnet/src/LaunchDarkly.Observability/Sampling/IExportSampler.cs

@@ -9,7 +9,7 @@ internal class SamplingResult
         public bool Sample { get; set; }
         public Dictionary<string, object> Attributes { get; set; } = new Dictionary<string, object>();
     }
-    
+
     internal interface IExportSampler
     {
         SamplingResult SampleSpan(Activity span);

sdk/@launchdarkly/observability-dotnet/test/LaunchDarkly.Observability.Tests/ObservabilityConfigBuilderTests.cs

@@ -121,7 +121,7 @@ public void WithExtendedTracingConfig_StoresConfigurationAction()
             // The action is stored but not executed during build
             Assert.That(config.ExtendedTracerConfiguration, Is.Not.Null);
             Assert.That(config.ExtendedTracerConfiguration, Is.SameAs(customAction));
-            
+
             // Verify the action hasn't been called yet
             Assert.That(wasCalled, Is.False);
             Assert.That(capturedBuilder, Is.Null);
@@ -146,7 +146,7 @@ public void WithExtendedLoggerConfiguration_StoresConfigurationAction()
             // The action is stored but not executed during build
             Assert.That(config.ExtendedLoggerConfiguration, Is.Not.Null);
             Assert.That(config.ExtendedLoggerConfiguration, Is.SameAs(customAction));
-            
+
             // Verify the action hasn't been called yet
             Assert.That(wasCalled, Is.False);
             Assert.That(capturedBuilder, Is.Null);
@@ -171,7 +171,7 @@ public void WithExtendedMeterConfiguration_StoresConfigurationAction()
             // The action is stored but not executed during build
             Assert.That(config.ExtendedMeterConfiguration, Is.Not.Null);
             Assert.That(config.ExtendedMeterConfiguration, Is.SameAs(customAction));
-            
+
             // Verify the action hasn't been called yet
             Assert.That(wasCalled, Is.False);
             Assert.That(capturedBuilder, Is.Null);

sdk/@launchdarkly/observability-dotnet/test/LaunchDarkly.Observability.Tests/SamplingConfigClientTests.cs

@@ -564,7 +564,7 @@ public void Dispose_ShouldDisposeHttpClientIfDisposable()
             // Arrange
             var mockDisposableHttpClient = new Mock<IHttpClient>();
             mockDisposableHttpClient.As<IDisposable>();
-            
+
             var client = new SamplingConfigClient(mockDisposableHttpClient.Object, TestBackendUrl);
 
             // Act