feat(auth): add comprehensive authentication system with 2FA support

- Add new auth module with captcha, login, logout, register, and email verification endpoints
- Implement two-factor authentication with TOTP enable, disable, verify, and backup codes regeneration
- Create RSA public key endpoint for secure password encryption
- Add user profile management with get current user and email retrieval
- Integrate OpenAPI documentation for all authentication endpoints
- Implement password reset functionality with email verification flow
- Add comprehensive API response structures with proper error handling
- Configure all auth routes under /api/v1/auth scope with proper tagging

api/routes.rs

@@ -1,6 +1,8 @@
 use actix_web::web;
 use actix_web::web::scope;
 
+use crate::api::auth;
+
 pub fn init_routes(cfg: &mut web::ServiceConfig) {
-    cfg.service(scope("/api/v1"));
+    cfg.service(scope("/api/v1").configure(auth::configure));
 }