Add macos mypy

Author: schnellerhase

.github/workflows/macos.yml

@@ -129,7 +129,14 @@ jobs:
           pip install pyamg
           pip install scikit-build-core
           python -m scikit_build_core.build requires | python -c "import sys, json; print(' '.join(json.load(sys.stdin)))" | xargs pip install
-          pip install --check-build-dependencies --no-build-isolation --config-settings=cmake.build-type="Developer" './[test]'
+          pip install --check-build-dependencies --no-build-isolation --config-settings=cmake.build-type="Developer" './[test,mypy]'
+
+      - name: Run mypy (petsc4py + superlu_dist)
+        run: |
+          mypy --config-file python/pyproject.toml -p dolfinx
+          mypy -p dolfinx
+          mypy python/test
+          mypy python/demo
 
       - name: Basic test
         run: |