Refactor network utils directory

Simplify the structure of the network utils directory for better maintainability.

src/utils/auth/networkUtils.ts

@@ -4,5 +4,7 @@
 export { 
   hasCorsIssue,
   verifyServerConnection,
-  verifySupabaseConnection
-} from './network';
+  verifySupabaseConnection,
+  handleHttpUrlWithoutProxy,
+  logProxyInfo
+} from './network/networkUtils';