feat: add trending subject api

[everpcpc]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 24.84848% with 124 lines in your changes missing coverage. Please review.

Project coverage is 68.48%. Comparing base (3c8aa3c) to head (d2cfeb9).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/trending/subject.ts	1.36%	72 Missing ⚠️
lib/types/fetcher.ts	0.00%	23 Missing ⚠️
routes/private/routes/trending.ts	64.00%	18 Missing ⚠️
lib/trending/type.ts	40.00%	9 Missing ⚠️
tasks/trending.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #830      +/-   ##
==========================================
- Coverage   69.14%   68.48%   -0.66%     
==========================================
  Files          98      104       +6     
  Lines       15242    15414     +172     
  Branches      799      802       +3     
==========================================
+ Hits        10539    10557      +18     
- Misses       4694     4848     +154     
  Partials        9        9              

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