Implement REST API for Rick and Morty Characters

- Added CharacterController with two endpoints:
  - GET /api/characters/random: Retrieves a random character from the database.
  - GET /api/characters/search: Searches for characters by name.

- Introduced CharacterService for business logic and data management.
- Integrated CharacterRepository for database access.
- Implemented data fetching from the external Rick and Morty API during application startup.
- Configured MySQL as the main database and H2 for testing.
- Added Swagger documentation for API endpoints.

src/main/resources/application.properties

@@ -1,6 +1,6 @@
 spring.datasource.url=jdbc:mysql://localhost:3306/bookstore
 spring.datasource.username=root
-spring.datasource.password=Mypass1121.
+spring.datasource.password=pass
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 
 spring.jpa.hibernate.ddl-auto=validate