Add a Github Actions AI workflow

- https://docs.obsidian.md/Plugins/Releasing/Release+your+plugin+with+GitHub+Actions
- https://github.com/softprops/action-gh-release

.github/workflows/ci.yaml

@@ -0,0 +1,37 @@
+name: CI
+
+on: [push, pull_request, workflow_dispatch]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: 🛠️ Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'yarn'
+      - name: 📦 Install dependencies
+        run: yarn install
+      - name: 🧪 Test
+        run: yarn test
+      - name: 🔨 Build
+        run: yarn build
+      - name: 🚀 Create release
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          draft: true
+          files: |
+            main.js
+            manifest.json
+            styles.css