feat: Enhance validation and permissions handling across controllers

- Added `ValidatedJson` extractor for automatic JSON validation in `events_controller.rs`, `testimonials_controller.rs`, `mentors_controller.rs`, `gacha_items_controller.rs`, and `hackathon_controller.rs`.
- Replaced manual permission checks with `require_permissions!` and `require_auth!` macros in relevant controllers to streamline permission handling.
- Introduced `sanitization` utilities in `sanitization.rs` for improved input sanitization.
- Added `permission_macros.rs` to encapsulate permission checking logic and reduce boilerplate.
- Updated dependencies in `Cargo.toml` to include `serde_json` and `validator`.
- Implemented error handling improvements in `notification_service.rs` for better response management.

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

@@ -10,7 +10,8 @@ use super::hackathon_schema::SubmissionStatus;
 use crate::v1::hackathon::HackathonRepository;
 use crate::{AppState, ResponseSuccessDto, ErrorDto};
 use imphnen_entities::{PermissionsEnum, UsersDetailQueryDto};
-use imphnen_libs::{MetaRequestDto, ResponseListSuccessDto};
+use imphnen_libs::{MetaRequestDto, ResponseListSuccessDto, ValidatedJson};
+use imphnen_iam::require_permissions;
 use axum::{
     extract::{Extension, Path, Query},
     http::StatusCode,