chore(ci): add check

.github/workflows/ci.yml

@@ -284,3 +284,22 @@ jobs:
         run: pnpm build && pnpm test
       - run: git diff --exit-code
         if: steps.filter.outputs.src == 'true'
+
+  ast-grep:
+    name: AST Grep
+    runs-on: ubuntu-latest
+    steps:
+      - uses: taiki-e/checkout-action@v1
+      - uses: Boshen/setup-rust@main
+        with:
+          restore-cache: false
+          tools: ast-grep
+      - name: Check Char and Byte Offset
+        id: ast_grep
+        run: |
+          output=$(sg -p '$A.chars().enumerate()' -r '$A.char_indices()' -l rs)
+          echo "Output: $output"
+          if [ -n "$output" ]; then
+            echo "Error: Unexpected output detected"
+            exit 1
+          fi