Add invoke as task runner, ruff and fix mypy errors

files/gramps/gramps_rename.py

@@ -9,7 +9,9 @@ def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Rename Gramps document files by appending extensions from a list."
     )
-    parser.add_argument("directory", type=Path, help="Directory containing hashed files")
+    parser.add_argument(
+        "directory", type=Path, help="Directory containing hashed files"
+    )
     parser.add_argument("names_file", type=Path, help="Text file with target names")
     return parser.parse_args()
 
@@ -33,7 +35,9 @@ def rename_files(directory: Path, names: list[str]) -> None:
     for name in names:
         hash_part, dot, _ = name.partition(".")
         if not dot:
-            print(f"Skipping invalid entry (missing extension): {name}", file=sys.stderr)
+            print(
+                f"Skipping invalid entry (missing extension): {name}", file=sys.stderr
+            )
             continue
 
         source = directory / hash_part