Optimize document_cli_flags.py working on issue #81

[YashRL]

1. Removed Future Import: Removed the from __future__ import annotations import, as it's unnecessary in Python 3.7 and later.

2. Simplified Version Check: Simplified the version check for Python 3.10 or later.

3. Removed Unused Imports: Removed unused imports to clean up the code.

4. Simplified Type Annotation: Removed the type annotation for action.type in the format_action function to simplify the code.

5. Improved Readability: Made minor formatting improvements to enhance readability.