feat: improve the GitHub push UI

[ali00209]

Key Enhancements

Redesigned Push Interface

• Modernized the push UI with a clean, responsive layout
• Incorporated clear instructions and guidance for the user
• Added real-time feedback for push status and progress

Summary

This PR enhances the pushToGitHub function with the following improvements:

• Custom Error Handling: Provides specific messages for GitHub API rate limits and SAML enforcement.
• Branch Management: Supports branch creation and updating of existing branches.
• Repository Visibility: Allows setting the repository as public or private based on user input.
• Optimized Blob Creation: Implements batch processing for blob creation to avoid hitting rate limits.

Screenshot

[spaco67]

cool

[goncaloalves]

Looks good!