BE-3 Add PATCH /books/:id endpoint for editing book

[tecnodeveloper]

PR Description

• Implemented book edit functionality
• Added PUT /books/:id endpoint
• Created updateBook controller
• Implemented update logic in service layer using Prisma
• Added validation for request body using updateBookSchema (partial updates allowed)
• Validated route parameter id
• Added error handling:
  • Returns 404 if book does not exist
  • Returns 400 for invalid input (e.g., negative price)
• Updated authors handling (replaces existing authors if provided)