ci: add Forgejo Actions build-and-test workflow

.forgejo/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install .NET 8
+        run: |
+          curl -sSL https://dot.net/v1/dotnet-install.sh -o dotnet-install.sh
+          chmod +x dotnet-install.sh
+          ./dotnet-install.sh --channel 8.0 --install-dir $HOME/.dotnet
+          echo "$HOME/.dotnet" >> $GITHUB_PATH
+          echo "DOTNET_ROOT=$HOME/.dotnet" >> $GITHUB_ENV
+
+      - name: Restore (Linux solution filter — excludes Windows-only WPF app)
+        run: dotnet restore TeamsISO.Linux.slnf
+
+      - name: Build (Release, treat warnings as errors)
+        run: dotnet build TeamsISO.Linux.slnf --configuration Release --no-restore
+
+      - name: Test (excluding requires=ndi)
+        run: >
+          dotnet test TeamsISO.Linux.slnf
+          --configuration Release
+          --no-build
+          --logger "trx;LogFileName=test-results.trx"
+          --collect:"XPlat Code Coverage"
+          --filter "Category!=ndi&requires!=ndi"
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: '**/test-results.trx'