fix: apply isort formatting to fix CI linting

Applied isort to properly sort all imports according to PEP8:
- Standard library imports first
- Third-party imports second
- Local imports last
- Alphabetical ordering within each group

All tests still passing after import reordering.

utils/__init__.py

@@ -2,8 +2,8 @@
 Utility functions for Gemini MCP Server
 """
 
-from .file_utils import read_files, read_file_content
-from .token_utils import estimate_tokens, check_token_limit
+from .file_utils import read_file_content, read_files
+from .token_utils import check_token_limit, estimate_tokens
 
 __all__ = [
     "read_files",