feat: Implement hackathon registration module with controller, DTOs, repository, schema, and service

- Added registration_controller.rs to handle registration-related routes and logic.
- Created registration_dto.rs for data transfer objects related to registrations.
- Implemented registration_repository.rs for database interactions concerning registrations.
- Defined registration_schema.rs to represent the registration data structure.
- Developed registration_service.rs to encapsulate business logic for registrations.
- Established routes for registering, listing, updating, and checking in participants for hackathons.
- Added validation for registration requests and status updates.
- Included statistics retrieval for hackathon registrations.

imphnen-libs/src/surrealdb/resource.rs

@@ -53,6 +53,8 @@ pub enum ResourceEnum {
     HackathonSubmissions,
     /// Hackathon registrations table for participant registrations
     HackathonRegistrations,
+    /// Notifications table for user notifications
+    Notifications,
     /// Rate limiting table for IP-based rate limiting
     RateLimit,
     /// Audit log table for admin action tracking
@@ -85,6 +87,7 @@ impl fmt::Display for ResourceEnum {
             ResourceEnum::HackathonTimeline => "app_hackathon_timeline",
             ResourceEnum::HackathonSubmissions => "app_hackathon_submissions",
             ResourceEnum::HackathonRegistrations => "hackathon_registrations",
+            ResourceEnum::Notifications => "notifications",
             ResourceEnum::RateLimit => "app_rate_limit",
             ResourceEnum::AuditLog => "app_audit_log",
             ResourceEnum::Sessions => "app_sessions",
@@ -129,6 +132,7 @@ impl ResourceEnum {
             ResourceEnum::HackathonTimeline => "app_hackathon_timeline",
             ResourceEnum::HackathonSubmissions => "app_hackathon_submissions",
             ResourceEnum::HackathonRegistrations => "hackathon_registrations",
+            ResourceEnum::Notifications => "notifications",
             ResourceEnum::RateLimit => "app_rate_limit",
             ResourceEnum::AuditLog => "app_audit_log",
             ResourceEnum::Sessions => "app_sessions",