refactor: enhance WHMCS HTTP client and authentication error handling

- Improved error logging in WhmcsHttpClientService by simplifying log messages.
- Introduced RequestWithCookies type for better type safety in auth controllers.
- Refactored ValidatedUser interface for internal consistency.
- Streamlined error handling by removing deprecated constants and consolidating token logic.
- Enhanced maintainability by removing unused methods in token services.

apps/bff/src/modules/auth/infra/token/token.constants.ts

@@ -0,0 +1,2 @@
+export const ACCESS_TOKEN_EXPIRY = "15m";
+export const REFRESH_TOKEN_EXPIRY = "7d";