Add GitHub Actions workflow for Copilot environment setup and consolidate .NET setup across all workflows (#830)

Author: Copilot

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

@@ -0,0 +1,38 @@
+name: 'Setup .NET Environment'
+description: 'Set up .NET SDK, configure dependency caching, restore, and optionally build'
+inputs:
+  build:
+    description: 'Whether to run dotnet build after restore'
+    required: false
+    default: 'true'
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup dotnet SDK
+      uses: actions/setup-dotnet@v5
+      with:
+        dotnet-version: |
+          6.0.x
+          7.0.x
+          8.0.x
+    
+    - name: Set up dependency caching for faster builds
+      uses: actions/cache@v4
+      id: nuget-cache
+      with:
+        path: |
+          ~/.nuget/packages
+          ${{ github.workspace }}/**/obj/project.assets.json
+        key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+          ${{ runner.os }}-nuget-
+    
+    - name: Restore dependencies
+      shell: bash
+      run: dotnet restore
+    
+    - name: Build
+      if: ${{ inputs.build == 'true' }}
+      shell: bash
+      run: dotnet build --no-restore

.github/workflows/Code-Analysis.yml

@@ -14,24 +14,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - name: Setup dotnet SDK
-        uses: actions/setup-dotnet@v5
+      - name: Setup .NET environment
+        uses: ./.github/actions/setup-dotnet
         with:
-            global-json-file: global.json
-      - name: Set up dependency caching for faster builds
-        uses: actions/cache@v4
-        id: nuget-cache
-        with:
-            path: |
-              ~/.nuget/packages
-              ${{ github.workspace }}/**/obj/project.assets.json
-            key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
-            restore-keys: |
-              ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
-              ${{ runner.os }}-nuget-
-      # Run NuGet restore for the solution at repo root
-      - name: Run NuGet restore
-        run: dotnet restore
+          build: 'false'
 
       # Run code analysis for the solution at repo root
       - name: Run .NET Code Analysis

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

@@ -30,28 +30,8 @@ jobs:
         os: [ubuntu-latest, windows-latest, macOS-latest]
     steps:
       - uses: actions/checkout@v5
-      - name: Setup dotnet SDK
-        uses: actions/setup-dotnet@v5
-        with:
-          dotnet-version: | 
-            6.0.x
-            7.0.x
-            8.0.x
-      - name: Set up dependency caching for faster builds
-        uses: actions/cache@v4
-        id: nuget-cache
-        with:
-            path: |
-              ~/.nuget/packages
-              ${{ github.workspace }}/**/obj/project.assets.json
-            key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
-            restore-keys: |
-              ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
-              ${{ runner.os }}-nuget-
-      - name: Restore dependencies
-        run: dotnet restore
-      - name: Build
-        run: dotnet build --no-restore
+      - name: Setup .NET environment
+        uses: ./.github/actions/setup-dotnet
       - name: Test
         run: dotnet test --no-build --no-restore --verbosity normal --logger trx --results-directory ${{ runner.temp }}
 

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

@@ -0,0 +1,25 @@
+name: Copilot Setup Steps
+
+on:
+  push:
+    paths:
+      - '.github/workflows/copilot-setup-steps.yml'
+  pull_request:
+    paths:
+      - '.github/workflows/copilot-setup-steps.yml'
+  workflow_dispatch:
+
+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 environment
+        uses: ./.github/actions/setup-dotnet