Ordinary functions for now, add two more functions, update tests, repackage cli

[tnm]

For features and factoring:

• Removed async from GitHub API methods
• Updated CLI to use synchronous calls
• Removed aiohttp dependency
• Renamed and reorganized PR creation functions for clarity
• Created consistent pattern across all PR creation methods:
  • create_pr_from_file (single file)
  • create_pr_from_content (single content)
  • create_pr_from_multiple_contents (multiple content strings)
  • create_pr_from_files (multiple files)

For docs:

• Updated Quick Start section in README
• Added detailed explanations for each PR creation method
• Added use cases and examples
• Improved common options documentation

Dependencies and tests updated accordingly.

[josh]

Nice