Add minimal test for basic hackathon operations and enhance test utilities

- Introduced a new test module for hackathon-related functionality.
- Implemented a basic test for creating a hackathon using a mock repository.
- Enhanced the test utilities in `lib.rs` for better request handling and response extraction.
- Added a `ServiceClient` struct to facilitate HTTP requests in tests.
- Created a `RequestBuilder` to streamline building and sending requests with headers and JSON bodies.

imphnen-iam/src/v1/auth/auth_service.rs

@@ -65,7 +65,7 @@ impl AuthServiceTrait for AuthService {
 		payload: AuthLoginRequestDto,
 		state: &AppState,
 	) -> Pin<Box<dyn Future<Output = Response> + Send>> {
-        let payload = payload;
+        
         let state = state.to_owned();
         Box::pin(async move {
 		if let Err((status, message)) = validate_request(&payload) {

imphnen-iam/src/v1/auth/google/google_oauth_controller.rs

@@ -93,4 +93,10 @@ where
     fn clone(&self) -> Self {
         Self::with_service(self.google_oauth_service.clone())
     }
+}
+
+impl Default for GoogleOauthController<GoogleOauthServiceImpl<crate::v1::auth::auth_service::AuthService, crate::v1::users::users_service::UsersService>> {
+    fn default() -> Self {
+        Self::new()
+    }
 }

imphnen-iam/src/v1/auth/google/google_oauth_service.rs

@@ -1,6 +1,8 @@
 use std::pin::Pin;
 use std::future::Future;
 use anyhow::Result;
+// Type alias to reduce clippy type_complexity warnings for long Future signatures
+type GoogleOauthCallbackFut<'a> = Pin<Box<dyn Future<Output = Result<(UsersDetailItemDto, TokenDto), Error>> + Send + 'a>>;
 
 use oauth2::{
     AuthUrl, ClientId, ClientSecret, CsrfToken, PkceCodeChallenge, PkceCodeVerifier,
@@ -103,7 +105,7 @@ pub trait GoogleOauthService<A: AuthServiceTrait + Send + Sync + 'static, U: Use
     // Removed new() from trait
     fn with_services(auth_service: A, users_service: U, env: &'static Env) -> Self;
     fn generate_auth_url(&self, custom_redirect_uri: Option<String>) -> (Url, CsrfToken);
-    fn google_oauth_callback(&self, auth_request: AuthRequest, app_state: &AppState) -> Pin<Box<dyn Future<Output = Result<(UsersDetailItemDto, TokenDto), Error>> + Send + '_>>; // Changed return type
+    fn google_oauth_callback(&self, auth_request: AuthRequest, app_state: &AppState) -> GoogleOauthCallbackFut<'_>; // Changed return type
 }
 
 #[derive(Clone)]