Add azure pipelines for build and for publish nuget

Author: AndreyDeev

.azure/azure-build.yml

@@ -0,0 +1,53 @@
+trigger:
+- zero
+
+pool:
+  vmImage: 'windows-2022'
+
+name: $(Date:yyyyMMdd).$(Rev:r)
+
+variables:
+  solution: 'LiteDB.sln'
+  buildPlatform: 'Any CPU'
+  buildConfiguration: 'Release'
+
+steps:
+- task: NuGetToolInstaller@1
+
+- task: NuGetCommand@2
+  inputs:
+    command: 'restore'
+    restoreSolution: '$(Build.SourcesDirectory)\$(solution)'
+    feedsToUse: 'select'
+    vstsFeed: '37514f74-c7cc-4c80-ad25-a7ede6743148'
+
+- task: VSBuild@1
+  displayName: 'Compile'
+  inputs:
+    solution: '$(solution)'
+    platform: '$(buildPlatform)'
+    configuration: '$(buildConfiguration)'
+    maximumCpuCount: true
+
+# At the moment of writing, Azure Pipelines use 17.3.0-preview-20220626-01 test platform version,
+# That has some bugs regarding xUnit tests, thus specifying a stable version explicitly.
+# See https://stackoverflow.com/a/73414352/1828989.
+
+#- task: VisualStudioTestPlatformInstaller@1
+#  inputs:
+#    versionSelector: 'SpecificVersion'
+#    testPlatformVersion: '17.2.0'
+
+- task: VSTest@2
+  displayName: 'Unit Tests'
+  inputs:
+    platform: '$(buildPlatform)'
+    configuration: '$(buildConfiguration)'
+    testSelector: 'testAssemblies'
+    testAssemblyVer2: |
+      **\LiteDB.Tests.dll
+      !**\obj\**
+      !**\ref\**
+    searchFolder: '$(System.DefaultWorkingDirectory)'
+    runInParallel: true
+    vsTestVersion: 'toolsInstaller'

.azure/publish-nuget.yml

@@ -0,0 +1,45 @@
+trigger: none
+pr: none
+
+pool:
+  vmImage: 'windows-2022'
+
+name: $(majorMinorVersion).$(semanticVersion)
+
+variables:
+  solution: 'LiteDB.sln'
+  buildConfiguration: 'Release'
+  majorMinorVersion: 5.0.17
+  # semanticVersion counter is automatically incremented by one in each execution of pipeline
+  # second parameter is seed value to reset to every time the referenced majorMinorVersion is changed
+  semanticVersion: $[counter(variables['majorMinorVersion'], 0)]-patch
+
+steps:
+- task: NuGetToolInstaller@1
+
+- task: NuGetCommand@2
+  displayName: 'NuGet Restore'
+  inputs:
+    command: 'custom'
+    arguments: 'restore $(Build.SourcesDirectory)\$(solution) -LockedMode -Verbosity Detailed -NonInteractive'
+
+- task: DotNetCoreCLI@2
+  displayName: 'dotnet pack'
+  inputs:
+    command: 'pack'
+    configuration: '$(buildConfiguration)'
+    packagesToPack: '**/LiteDB.csproj'
+    includesymbols: true
+    versioningScheme: byBuildNumber
+
+- task: NuGetAuthenticate@0
+  displayName: 'NuGet Authenticate'
+
+- task: NuGetCommand@2
+  displayName: 'NuGet push'
+  inputs:
+    command: 'push'
+    packagesToPush: '$(Build.ArtifactStagingDirectory)/**/*.nupkg;!$(Build.ArtifactStagingDirectory)/**/*.symbols.nupkg'
+    nuGetFeedType: 'internal'
+    publishVstsFeed: '37514f74-c7cc-4c80-ad25-a7ede6743148'
+    allowPackageConflicts: true