Add Support for GeeksForGeeks Profile Integration

[iShinzoo]

• As part of expanding platform coverage, implement integration with GeeksForGeeks user profiles to display problem-solving progress and ratings.
• This should follow the existing pattern used for LeetCode/HackerRank integrations.

Acceptance Criteria:

• Successfully fetch and display GeeksForGeeks user data
• Consistent UI with existing platform integrations
• Error handling for invalid/missing GeeksForGeeks profiles
• Performance comparable to existing integrations