ci: add workflow with pnpm + wrangler dry-run deploy

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: ci
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm exec wrangler deploy --dry-run
+        env:
+          CLOUDFLARE_API_TOKEN: dummy