chore: migrate to ruff (#4305)

* base requirements

* autofix

* Configure ruff for Python linting and formatting

- Set up minimal ruff configuration with basic checks (E, W, F, I)
- Add temporary ignores for common issues during migration
- Configure pre-commit hooks to use ruff with pass_filenames
- This enables gradual migration from black to ruff

* Delete sdj

* autofixed only

* migrate lint action

* more autofixed

* more fixes

* change precommit

* try changing the hook

* try this stuff

letta/services/mcp/base_client.py

@@ -1,8 +1,7 @@
 from contextlib import AsyncExitStack
 from typing import Optional, Tuple
 
-from mcp import ClientSession
-from mcp import Tool as MCPTool
+from mcp import ClientSession, Tool as MCPTool
 from mcp.client.auth import OAuthClientProvider
 from mcp.types import TextContent