fix: リノートをリノートする時は元投稿を参照する

[laminne]

related #1465

What does this PR do?

• リノートをリノートする時はリノート対象が参照している投稿を参照するようにしました
  • (日本語が難しい, 詳しくはIssueを見てください)

Additional information

• NoteモデルにisRenote/isQuoteメソッドを追加
  • 同時にrenote/quoteメソッドも追加しています

Checklist

• Includes API changes
  • Includes braking changes
    • If you change any endpoint schema, you must update the OpenAPI schema definitions (use pnpm build:api).
• Includes database schema changes

[codecov]

Codecov Report

❌ Patch coverage is 94.28571% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 42.29%. Comparing base (b9c42c7) to head (836cf61).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/notes/service/renote.ts	92.30%	3 Missing ⚠️
pkg/notes/model/note.ts	96.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1471      +/-   ##
==========================================
+ Coverage   41.80%   42.29%   +0.49%     
==========================================
  Files         143      143              
  Lines        5411     5454      +43     
  Branches      920      935      +15     
==========================================
+ Hits         2262     2307      +45     
+ Misses       3149     3147       -2     

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