fix: Improve sorting logic for good first issues and stars

[Viral1127]

** ### What Changed**

• Updated the logic for sorting repositories by number of issues or star count.
• Changed the sorting function sortByGoodFirstIssues to prioritize sorting by the number of issues first and use stars as a tie-breaker.
• Updated the sortByStars function to sort repositories only by star count.

### Why This Change?
These changes improve the logic for prioritizing repositories in lists of "good first issues," making it easier to discover useful projects.

### Changes Made

• Improved logic in sortByGoodFirstIssues:
  • Sorts repositories by issue count, with star count as a tie-breaker.
• Improved logic in sortByStars:
  • Sorts repositories only by star count in descending order.

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### How to Test

1. Check the sorting behavior with sample repository data.
2. Validate that the changes align with expected sorting behavior.

[nahomtechet]

actually it good