feat(auth): Implement Google OAuth 2.0 integration with user creation and JWT generation

- Added Google OAuth controller and service to handle authentication via Google.
- Introduced DTOs for Google user and token responses.
- Updated AuthService and UsersService traits to support new Google OAuth functionality.
- Implemented logic to create a new user if they do not exist in the system after Google authentication.
- Enhanced existing user retrieval and JWT generation upon successful login.
- Added tests for Google OAuth flow, including login redirection and callback handling for both new and existing users.
- Updated environment configuration to include Google OAuth credentials.

imphnen-backend/src/bin/api.rs

@@ -1,3 +1,4 @@
+use axum::Router;
 use imphnen_gateway::gateway_service;
 use imphnen_libs::axum_init;
 
@@ -5,7 +6,10 @@ use imphnen_libs::axum_init;
 async fn main() {
 	env_logger::init();
 	axum_init(|surrealdb_ws, surrealdb_mem| async {
-		gateway_service(surrealdb_ws, surrealdb_mem).await
+		let app = gateway_service(surrealdb_ws, surrealdb_mem).await;
+        let mut router = Router::new();
+        router = router.nest("/api/v1/auth", imphnen_iam::v1::auth::auth_router());
+        app.merge(router)
 	})
 	.await;
 }