feat: GET /books/{id}

[scarf005]

resolves #69

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 242 lines in your changes missing coverage. Please review.

Project coverage is 9.41%. Comparing base (12be539) to head (08bc2e2).

Files with missing lines	Patch %	Lines
backend/src/books/books.service.ts	0.00%	45 Missing ⚠️
backend/src/books/books.controller.ts	0.00%	33 Missing ⚠️
backend/src/entities/Book.ts	0.00%	30 Missing ⚠️
backend/src/books/dto/books.dto.ts	0.00%	29 Missing ⚠️
backend/src/entities/BookCopy.ts	0.00%	24 Missing ⚠️
backend/src/categories/categories.service.ts	0.00%	12 Missing ⚠️
backend/src/common/dtos/page-options.dto.ts	0.00%	11 Missing ⚠️
backend/src/books/books.module.ts	0.00%	6 Missing ⚠️
backend/src/common/dtos/meta.dto.ts	0.00%	6 Missing ⚠️
backend/src/common/dtos/page.dto.ts	0.00%	5 Missing ⚠️
... and 19 more

Additional details and impacted files

@@            Coverage Diff            @@
##             main     #74      +/-   ##
=========================================
- Coverage   11.59%   9.41%   -2.19%     
=========================================
  Files          48      57       +9     
  Lines         664     818     +154     
  Branches        0      11      +11     
=========================================
  Hits           77      77              
- Misses        587     741     +154     

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