add HelloWorldFSharp example plugin

Author: JohnTheGr8

Flow.Launcher.sln

@@ -74,6 +74,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Flow.Launcher.Plugin.Browse
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Flow.Launcher.Plugin.Calculator", "Plugins\Flow.Launcher.Plugin.Calculator\Flow.Launcher.Plugin.Calculator.csproj", "{59BD9891-3837-438A-958D-ADC7F91F6F7E}"
 EndProject
+Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "HelloWorldFSharp", "Plugins\HelloWorldFSharp\HelloWorldFSharp.fsproj", "{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -313,6 +315,18 @@ Global
 		{59BD9891-3837-438A-958D-ADC7F91F6F7E}.Release|x64.Build.0 = Release|Any CPU
 		{59BD9891-3837-438A-958D-ADC7F91F6F7E}.Release|x86.ActiveCfg = Release|Any CPU
 		{59BD9891-3837-438A-958D-ADC7F91F6F7E}.Release|x86.Build.0 = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|x64.Build.0 = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Debug|x86.Build.0 = Debug|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|x64.ActiveCfg = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|x64.Build.0 = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|x86.ActiveCfg = Release|Any CPU
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -332,6 +346,7 @@ Global
 		{C21BFF9C-2C99-4B5F-B7C9-A5E6DDDB37B0} = {3A73F5A7-0335-40D8-BF7C-F20BE5D0BA87}
 		{9B130CC5-14FB-41FF-B310-0A95B6894C37} = {3A73F5A7-0335-40D8-BF7C-F20BE5D0BA87}
 		{59BD9891-3837-438A-958D-ADC7F91F6F7E} = {3A73F5A7-0335-40D8-BF7C-F20BE5D0BA87}
+		{30DDA7D9-3712-44F4-BD18-DC1C05B2DD9E} = {3A73F5A7-0335-40D8-BF7C-F20BE5D0BA87}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {F26ACB50-3F6C-4907-B0C9-1ADACC1D0DED}

Plugins/HelloWorldFSharp/HelloWorldFSharp.fsproj

@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+    <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <OutputPath>..\..\Output\Debug\Plugins\HelloWorldFSharp\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <OutputPath>..\..\Output\Release\Plugins\HelloWorldFSharp\</OutputPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Content Include="plugin.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+    <Compile Include="Main.fs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Flow.Launcher.Plugin\Flow.Launcher.Plugin.csproj" />
+  </ItemGroup>
+
+</Project>

Plugins/HelloWorldFSharp/Main.fs

@@ -0,0 +1,31 @@
+namespace HelloWorldFSharp
+
+open Flow.Launcher.Plugin
+open System.Collections.Generic
+
+type HelloWorldFSharpPlugin() =
+
+    let mutable initContext = PluginInitContext()
+
+    interface IPlugin with
+        member this.Init (context: PluginInitContext) =
+            initContext <- context
+
+        member this.Query (query: Query) =
+            List<Result> [
+                Result (Title = "Hello World from F#",
+                        SubTitle = sprintf "Query: %s" query.Search)
+
+                Result (Title = "Browse source code of this plugin",
+                        SubTitle = "click to open in browser",
+                        Action = (fun ctx ->
+                                    initContext.CurrentPluginMetadata.Website
+                                        |> System.Diagnostics.Process.Start
+                                        |> ignore
+                                    true))
+
+                Result (Title = "Trigger a tray message",
+                        Action = (fun _ ->
+                                    initContext.API.ShowMsg ("Sample tray message", "from the F# plugin")
+                                    false))
+            ]

Plugins/HelloWorldFSharp/plugin.json

@@ -0,0 +1,11 @@
+{
+    "ID":"8FF5D5C1F8194958A12E8668FB7ECC04",
+    "ActionKeyword":"hf",
+    "Name":"Hello World FSharp",
+    "Description":"Hello World FSharp",
+    "Author":"Ioannis G.",
+    "Version":"1.0.0",
+    "Language":"fsharp",
+    "Website":"https://github.com/Flow-Launcher/Flow.Launcher",
+    "ExecuteFileName":"HelloWorldFSharp.dll"
+}