ci: add simple test pipeline

.gitea/workflows/ci.yaml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  pull_request:
+
+jobs:
+  build:
+    runs-on:
+      - ubuntu-latest
+      - linux_amd64
+    steps:
+      - uses: actions/checkout@v4
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential cmake
+      - name: Configure and build
+        run: |
+          mkdir -p build
+          cd build
+          cmake ..
+          cmake --build .
+      - name: Verify binary
+        run: |
+          test -f build/usbmakroboard && echo "Binary built successfully" || exit 1