Run astro check in CI

.github/workflows/check.yml

@@ -0,0 +1,25 @@
+name: Check
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        uses: pnpm/action-setup@v4
+        with:
+          run_install: true
+
+      - name: Run astro check
+        run: pnpm astro check
+