Add initial copilot-setup-steps.yml workflow

Co-authored-by: BenjaminMichaelis <22186029+BenjaminMichaelis@users.noreply.github.com>

Author: Copilot

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

@@ -0,0 +1,78 @@
+name: Setup GitHub Copilot Agent Environment
+
+# This workflow configures the environment for GitHub Copilot agents
+# It reuses configuration from the main Build-Test-And-Deploy workflow
+# to ensure consistency and reduce duplication
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  setup-environment:
+    runs-on: ubuntu-latest
+    environment: "BuildAndUploadImage"
+
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Set up .NET Core
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+          source-url: https://pkgs.dev.azure.com/intelliTect/_packaging/EssentialCSharp/nuget/v3/index.json
+        env:
+          NUGET_AUTH_TOKEN: ${{ secrets.AZURE_DEVOPS_PAT }}
+
+      - 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') }}
+            ${{ runner.os }}-nuget-
+
+      - name: Restore with dotnet
+        run: dotnet restore
+
+      - name: Build with dotnet
+        run: dotnet build -p:ContinuousIntegrationBuild=True -p:ReleaseDateAttribute=True --configuration Release --no-restore
+
+      - name: Run .NET Tests
+        run: dotnet test --no-build --configuration Release
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Validate Docker build
+        uses: docker/build-push-action@v6
+        with:
+          push: false
+          tags: copilot-env-validation
+          file: ./EssentialCSharp.Web/Dockerfile
+          context: .
+          secrets: |
+            "nuget_auth_token=${{ secrets.AZURE_DEVOPS_PAT }}"
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Display environment information
+        run: |
+          echo "✅ Environment setup complete for GitHub Copilot agents"
+          echo "📦 .NET Version: $(dotnet --version)"
+          echo "🏗️ Build Status: Success"
+          echo "🐳 Docker Status: Ready"
+          echo "📂 Repository: ${{ github.repository }}"
+          echo "🔧 This environment is configured for:"
+          echo "   - .NET 9.0 development"
+          echo "   - ASP.NET Core web applications"
+          echo "   - Entity Framework"
+          echo "   - Semantic Kernel AI integration"
+          echo "   - Docker containerization"
+          echo "   - NuGet package management (public and private feeds)"