Add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,50 @@
+name: CI (main)
+
+on:
+  push:
+    branches: [ "main" ]
+    paths-ignore:
+      - "**/*.md"
+      - "**/*.gitignore"
+      - "**/*.gitattributes"
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Build
+    env:
+      DOTNET_CLI_TELEMETRY_OPTOUT: 1
+      DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
+      DOTNET_NOLOGO: true
+      DOTNET_ADD_GLOBAL_TOOLS_TO_PATH: false
+      DOTNET_MULTILEVEL_LOOKUP: 0
+      DOTNET_SYSTEM_CONSOLE_ALLOW_ANSI_COLOR_REDIRECTION: true
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install .NET SDK
+      uses: actions/setup-dotnet@v4
+      with:
+        global-json-file: "./global.json"
+
+    - name: Install Aspire workload
+      run: dotnet workload install aspire
+
+    - name: Restore dependencies
+      run: dotnet restore
+
+    - name: Build
+      run: dotnet build --no-restore --configuration Release -p:SourceRevisionId=$GITHUB_SHA
+
+    - name: Pack (ci)
+      run: dotnet pack --configuration Release --output ./artifacts/ci --verbosity normal -p:SourceRevisionId=$GITHUB_SHA
+
+    - name: Upload artifacts (packages)
+      uses: actions/upload-artifact@v4
+      with:
+        name: nupkg
+        path: ./artifacts/**/*.nupkg
+        retention-days: 5