Add mypy type checking to pre-commit hook

Author: zgreathouse

.pre-commit-config.yaml

@@ -5,3 +5,10 @@ repos:
       - id: ruff
         args: ["--fix"]
         types: [python]
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.15.0
+    hooks:
+      - id: mypy
+        args: ["--ignore-missing-imports"]
+        types: [python]