feat(provider): add Figma provider

[halvaradop]

☕️ Reasoning

This pull request introduces a new OAuth 2.0 provider for the Auth.js package: Figma. This integration allows users to authenticate with their Figma accounts.

🧢 Checklist

• Documentation
• Tests
• Ready to be merged

🎫 Affected issues

📌 Resources

• Security guidelines
• Contributing guidelines
• Code of conduct
• Contributing to Open Source

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
auth-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 22, 2025 8:26pm

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
next-auth-docs	⬜️ Ignored (Inspect)	Visit Preview		Jan 22, 2025 8:26pm

[vercel]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 127 lines in your changes missing coverage. Please review.

Project coverage is 39.55%. Comparing base (6a72f3d) to head (dc2b229).

Files with missing lines	Patch %	Lines
packages/core/src/providers/figma.ts	0.00%	127 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12529      +/-   ##
==========================================
- Coverage   39.71%   39.55%   -0.17%     
==========================================
  Files         196      197       +1     
  Lines       31061    31188     +127     
  Branches     1374     1375       +1     
==========================================
  Hits        12337    12337              
- Misses      18724    18851     +127     

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