Separate system operations from core objects in GraphQL endpoints (#12977)

Moves system-level operations (auth, billing, admin) to use the
/metadata endpoint instead of /graphql.

This cleans up the endpoint separation so /graphql is purely for core
objects (Company, People, etc.) and /metadata handles all system
operations.

Part of prep work for webhook/API key core migration.

packages/twenty-front/src/pages/auth/PasswordReset.tsx

@@ -28,7 +28,7 @@ import { z } from 'zod';
 import {
   useUpdatePasswordViaResetTokenMutation,
   useValidatePasswordResetTokenQuery,
-} from '~/generated/graphql';
+} from '~/generated-metadata/graphql';
 import { useNavigateApp } from '~/hooks/useNavigateApp';
 import { logError } from '~/utils/logError';