feat(tasks): Implement task CRUD API endpoints

[Zafar7645]

User Story: As a project member, I need API endpoints to manage the tasks within a project.

Acceptance Criteria:

• Create a TasksModule in the NestJS backend.
• Implement a POST /tasks endpoint to create a new task. It should accept a title, description, status, and project ID.
• Implement a PATCH /tasks/:id endpoint to update a task's details (e.g., title, description, or status for drag-and-drop).
• Implement a DELETE /tasks/:id endpoint to delete a task.
• Ensure all endpoints are protected and validate that the user has permission to modify tasks within the specified project.