Add CI

.github/workflows/ci.yaml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_requests:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Restore dependencies
+        run: dotnet restore
+
+      - name: Build
+        run: dotnet build --no-restore