feat: reviews api 명세 작성

[parkj12b]

closes #46

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 42 lines in your changes missing coverage. Please review.

Project coverage is 3.06%. Comparing base (a48a274) to head (de85db1).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
backend/src/reviews/schema/reviews.schema.ts	0.00%	13 Missing ⚠️
backend/src/reviews/reviews.controller.ts	0.00%	12 Missing ⚠️
backend/src/reviews/dto/reviews.dto.ts	0.00%	11 Missing ⚠️
backend/src/reviews/reviews.module.ts	0.00%	4 Missing ⚠️
backend/src/reviews/reviews.service.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #53      +/-   ##
========================================
- Coverage   3.31%   3.06%   -0.26%     
========================================
  Files         34      39       +5     
  Lines        513     555      +42     
========================================
  Hits          17      17              
- Misses       496     538      +42     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.