refactor(api): reorder imports and update code formatting across repository endpoints

- Reordered actix-web imports to standardize import order
- Reordered crate module imports to follow alphabetical ordering
- Updated function calls to use multi-line formatting for better readability
- Standardized blank lines around documentation comments
- Applied consistent formatting to response handling methods
- Normalized import organization across all repository-related API files
- Improved code consistency and maintainability through standardized formatting
- Applied formatting updates to all repository endpoint implementations

api/repo/leave_repo.rs

@@ -1,8 +1,8 @@
-use actix_web::{web, HttpResponse};
+use actix_web::{HttpResponse, web};
 use serde::Deserialize;
 use utoipa::IntoParams;
 
-use crate::api::response::{ApiResponse, ApiErrorResponse};
+use crate::api::response::{ApiErrorResponse, ApiResponse};
 use crate::error::AppError;
 use crate::service::AppService;
 use crate::session::Session;
@@ -19,14 +19,14 @@ pub struct PathParams {
 ///
 /// Removes the current user's access to the repository.
 /// Requires the user to be a member of the repository.
-/// 
+///
 /// Restrictions:
 /// - Repository owner cannot leave (use transfer_owner instead)
-/// 
+///
 /// Effects:
 /// - User loses all access to the repository
 /// - User is removed from all repository activities
-/// 
+///
 /// Returns success message on completion.
 #[utoipa::path(
     post,