add cspell to CI

.github/workflows/ci.yaml

@@ -313,6 +313,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: spell checker
+        uses: streetsidesoftware/cspell-action@v2
+        with:
+          files: '**/*.rs'
+          incremental_files_only: true
       - uses: dtolnay/rust-toolchain@stable
         with:
             components: rustfmt, clippy