add CI workflow

.gitea/workflows/CI.yaml

@@ -0,0 +1,32 @@
+name: .NET Tests
+on:
+  [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v3
+        with:
+          dotnet-version: '8.0.x'
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.nuget/packages
+          key: nuget-${{ runner.os }}-${{ hashFiles('**/packages.lock.json') }}
+          restore-keys: |
+            nuget-${{ runner.os }}-
+
+      - name: Build application
+        run: dotnet build --no-restore
+
+      - name: Run tests
+        run: dotnet test --no-build --verbosity normal