Add new endpoint /books/search to handle search by description

[nanotaboada]

Description

Implement a new endpoint /books/search that allows users to search for books based on their description. This feature should integrate with the existing repository and handle search queries efficiently.

Acceptance Criteria

• Implement the /books/search endpoint in the controller.
• Modify the repository to support searching by description.
• Validate and sanitize search input to avoid SQL injection.
• Write tests to verify the endpoint works as expected.

Resources

• 🔗 Spring Data JPA Repositories