Enforce modern Python typing annotations with Ruff (#8296)

Co-authored-by: openhands <openhands@all-hands.dev>

dev_config/python/.pre-commit-config.yaml

@@ -26,7 +26,7 @@ repos:
       - id: ruff
         entry: ruff check --config dev_config/python/ruff.toml
         types_or: [python, pyi, jupyter]
-        args: [--fix]
+        args: [--fix, --unsafe-fixes]
       # Run the formatter.
       - id: ruff-format
         entry: ruff format --config dev_config/python/ruff.toml

dev_config/python/ruff.toml

@@ -7,6 +7,9 @@ select = [
     "Q",
     "B",
     "ASYNC",
+    "UP006",  # Use `list` instead of `List` for annotations
+    "UP007",  # Use `X | Y` instead of `Union[X, Y]`
+    "UP008",  # Use `X | None` instead of `Optional[X]`
 ]
 
 ignore = [