ci: replace drone with gitea workflows

.gitea/workflows/ci.yaml

@@ -0,0 +1,25 @@
+name: CI
+on:
+  pull_request:
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ inputs.node-version }}
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run lint
+        run: npm run check:code
+
+      - name: Run spellcheck
+        run: npm run check:spell