Add country rankings and globe country filtering

[pradipNP]

Changes

• Added country ranking calculation based on existing developer scores
• Added country rank badges to developer detail panel
• Added globe filtering for selected countries

Notes

• Rankings are calculated from the full developer dataset
• Existing leaderboard, search, compare, and claim flows remain unchanged

Future Work

• City rankings
• City leaderboard breakdowns
• City rank badges

[vercel]

@pradipNP is attempting to deploy a commit to the sajeetharan's projects Team on Vercel.

A member of the Team first needs to authorize it.

[pradipNP]

Implemented the MVP scope discussed earlier:

• Country-based rankings
• Country rank badges on developer profiles
• Globe filtering by selected country

City-level rankings and city leaderboard breakdowns can be added in a follow-up PR if this approach looks good.

Feedback is welcome. Thanks for reviewing!