Add comprehensive tests for hackathon service functionality

- Implemented tests for creating, retrieving, updating, and deleting hackathons.
- Added validation tests for hackathon creation and updates.
- Included tests for hackathon events and timelines, ensuring proper handling of edge cases.
- Created tests for hackathon submissions, including validation and submission status updates.
- Organized tests into a dedicated module for better structure and maintainability.

imphnen-hackathon/src/v1/hackathon/mod.rs

@@ -0,0 +1,20 @@
+use axum::Router;
+
+pub mod hackathon_controller;
+pub mod hackathon_dto;
+pub mod hackathon_repository;
+pub mod hackathon_schema;
+pub mod hackathon_service;
+
+// Export types and functions
+pub use hackathon_dto::*;
+pub use hackathon_repository::HackathonRepository;
+pub use hackathon_schema::*;
+pub use hackathon_service::{HackathonService, HackathonServiceTrait};
+
+// Export controller functions
+pub use hackathon_controller::*;
+
+pub fn hackathon_router() -> Router {
+    hackathon_controller::hackathon_routes()
+}