ci: add build action

.gitea/workflows/ci.yaml

@@ -0,0 +1,22 @@
+---
+name: build-and-test
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ^1.24
+      - name: Build binary
+        run: go build -v ./...
+      - name: Run tests
+        run: go test -json ./... > test-results.json
+      - name: Upload artefacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: test-results.json