[sdk_v2] migrate c# sdk_v2 implementation and build pipeline to public GH repo

.github/workflows/build-cs-steps.yml

@@ -0,0 +1,118 @@
+name: Build C# SDK
+
+on:
+  workflow_call:
+    inputs:
+      version:
+        required: true
+        type: string
+      useWinML:
+        required: false
+        type: boolean
+        default: false
+      buildConfiguration:
+        required: false
+        type: string
+        default: 'Debug' # or 'Release'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: windows-latest
+    env:
+      buildConfiguration: 'Debug'
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          clean: true
+
+      # adapted from https://github.com/actions/setup-dotnet?tab=readme-ov-file#azure-artifacts
+      # saves auth credentials to ../nuget.config
+      - name: Setup .NET 9 SDK
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: '9.0.x'
+          source-url: https://pkgs.dev.azure.com/microsoft/windows.ai.toolkit/_packaging/Neutron/nuget/v3/index.json
+        env:
+          NUGET_AUTH_TOKEN: ${{ secrets.AZURE_DEVOPS_PAT }}
+
+      - name: Restore dependencies
+        run: |
+          dotnet restore sdk_v2\cs\src\Microsoft.AI.Foundry.Local.csproj /p:UseWinML=${{ inputs.useWinML }} --configfile ../nuget.config
+
+      - name: Build solution
+        run: |
+          dotnet build sdk_v2\cs\src\Microsoft.AI.Foundry.Local.csproj --configfile ../nuget.config --no-restore --configuration ${{ inputs.buildConfiguration }} /p:UseWinML=${{ inputs.useWinML }}
+
+      # need to use direct git commands to clone from Azure DevOps instead of actions/checkout
+      - name: Checkout test-data-shared from Azure DevOps
+        shell: pwsh
+        working-directory: ${{ github.workspace }}\..
+        run: |
+          $pat = "${{ secrets.AZURE_DEVOPS_PAT }}"
+          $encodedPat = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(":$pat"))
+
+          # Configure git to use the PAT
+          git config --global http.https://dev.azure.com.extraheader "AUTHORIZATION: Basic $encodedPat"
+
+          # Clone with LFS to parent directory
+          git lfs install
+          git clone --depth 1 https://dev.azure.com/microsoft/windows.ai.toolkit/_git/test-data-shared test-data-shared
+
+          Write-Host "Clone completed successfully to ${{ github.workspace }}\..\test-data-shared"
+
+      - name: Checkout specific commit in test-data-shared
+        shell: pwsh
+        working-directory: ${{ github.workspace }}\..\test-data-shared
+        run: |
+          Write-Host "Current directory: $(Get-Location)"
+          git checkout 231f820fe285145b7ea4a449b112c1228ce66a41
+          if ($LASTEXITCODE -ne 0) {
+            Write-Error "Git checkout failed."
+            exit 1
+          }
+          Write-Host "`nDirectory contents:"
+          Get-ChildItem -Recurse -Depth 2 | ForEach-Object { Write-Host "  $($_.FullName)" }
+
+      - name: Run Foundry Local Core tests
+        run: |
+          dotnet test sdk_v2\cs\test\FoundryLocal.Tests\Microsoft.AI.Foundry.Local.Tests.csproj --verbosity normal /p:UseWinML=${{ inputs.useWinML }}
+
+      - name: Pack NuGet package
+        shell: pwsh
+        run: |
+          $projectPath = "sdk_v2\cs\src\Microsoft.AI.Foundry.Local.csproj"
+          $outputDir = "sdk_v2\cs\bin"
+          $version = "${{ inputs.version }}"
+          $config = "${{ inputs.buildConfiguration }}"
+          $useWinML = "${{ inputs.useWinML }}"
+
+          Write-Host "Packing project: $projectPath"
+          Write-Host "Output directory: $outputDir"
+          Write-Host "Version: $version"
+          Write-Host "Configuration: $config"
+          Write-Host "UseWinML: $useWinML"
+
+          & dotnet pack $projectPath --no-build --configuration $config --output $outputDir /p:PackageVersion=$version /p:UseWinML=$useWinML /p:IncludeSymbols=true /p:SymbolPackageFormat=snupkg --verbosity normal
+
+          if ($LASTEXITCODE -ne 0) {
+              Write-Error "dotnet pack failed with exit code $LASTEXITCODE"
+              exit $LASTEXITCODE
+          }
+
+          Write-Host "Pack completed successfully"
+          Write-Host "Generated packages:"
+          Get-ChildItem -Path $outputDir -Filter "*.nupkg" | ForEach-Object { Write-Host "  $($_.Name)" }
+          Get-ChildItem -Path $outputDir -Filter "*.snupkg" | ForEach-Object { Write-Host "  $($_.Name)" }
+
+      - name: Upload NuGet packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: cs-sdk
+          path: |
+            sdk_v2\cs\bin\*.nupkg
+            sdk_v2\cs\bin\*.snupkg

.github/workflows/foundry-local-sdk-build.yml

@@ -0,0 +1,24 @@
+name: SDK V2 Build
+
+on:
+  pull_request:
+    paths:
+      - 'sdk_v2/**'
+      - '.github/workflows/sdk_v2/**'
+  push:
+    paths:
+      - 'sdk_v2/**'
+      - '.github/workflows/sdk_v2/**'
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-cs:
+    uses: ./.github/workflows/build-cs-steps.yml
+    with:
+      version: '0.9.0.${{ github.run_number }}'
+    secrets: inherit