ci: disable GitHub workflow and add Gitea Actions workflow

.gitea/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: Gitea CI
+
+on:
+  push:
+    branches: [main, production]
+  pull_request:
+    branches: [main, production]
+
+jobs:
+  test-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install deps
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Test
+        run: npm run test
+
+      - name: Build
+        run: npm run build