Add GitHub Actions workflow for Copilot environment setup with reusable .NET build action

.github/actions/setup-dotnet-build/action.yml

@@ -0,0 +1,33 @@
+name: 'Setup .NET and Build'
+description: 'Sets up .NET environment, restores dependencies, and builds the project'
+inputs:
+  dotnet-version:
+    description: '.NET versions to install'
+    required: false
+    default: |
+      3.1.x
+      6.x
+  configuration:
+    description: 'Build configuration'
+    required: false
+    default: 'Release'
+  build-args:
+    description: 'Additional build arguments'
+    required: false
+    default: '-p:ContinuousIntegrationBuild=True --no-restore'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: ${{ inputs.dotnet-version }}
+
+    - name: Restore dependencies
+      run: dotnet restore
+      shell: pwsh
+
+    - name: Build
+      run: dotnet build --configuration ${{ inputs.configuration }} ${{ inputs.build-args }}
+      shell: pwsh

.github/workflows/build-and-test.yml

@@ -20,16 +20,8 @@ jobs:
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
     - uses: actions/checkout@v4
-    - name: Setup .NET
-      uses: actions/setup-dotnet@v4
-      with:
-        dotnet-version: | 
-            3.1.x
-            6.x
-    - name: Restore dependencies
-      run: dotnet restore
-    - name: Build
-      run: dotnet build -p:ContinuousIntegrationBuild=True --no-restore --configuration Release
+    - name: Setup .NET and Build
+      uses: ./.github/actions/setup-dotnet-build
     - name: Test
       run: dotnet test --no-build --configuration Release --verbosity normal
 

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,37 @@
+name: Copilot Setup Steps
+
+on:
+  push:
+    paths:
+      - '.github/workflows/copilot-setup-steps.yml'
+  pull_request:
+    paths:
+      - '.github/workflows/copilot-setup-steps.yml'
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: pwsh
+
+jobs:
+  copilot-setup-steps:
+    name: copilot-setup-steps
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v5
+
+    - name: Setup .NET and Build
+      uses: ./.github/actions/setup-dotnet-build
+      with:
+        configuration: 'Debug' 
+
+    - name: Setup Copilot environment
+      run: |
+        echo "Setting up Copilot-specific environment variables..."
+        echo "COPILOT_SETUP_COMPLETE=true" >> $env:GITHUB_ENV
+        echo "Copilot environment setup completed"