feat: Add searchByStatus API endpoint to TodoController

[yebiomesfin]

Changes Made

This PR adds a new API endpoint to the TodoController that allows searching todos by status.

New Endpoint:

• Route: GET /api/todos/search
• Parameter: status (optional query parameter)

Functionality:

• Returns completed todos when status=completed
• Returns pending todos when status=pending
• Returns all todos when no status parameter is provided

Example Usage:

GET /api/todos/search?status=completed
GET /api/todos/search?status=pending
GET /api/todos/search

Files Modified:

• backend/src/main/java/com/example/app/controller/TodoController.java

Commit:

• feat: add searchByStatus API endpoint to TodoController

---

Ready for review ✅