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/modules/settings/admin-panel/components/SettingsAdminGeneral.tsx

@@ -12,7 +12,7 @@ import { isNonEmptyString } from '@sniptt/guards';
 import { useState } from 'react';
 import { useRecoilState, useRecoilValue } from 'recoil';
 import { REACT_APP_SERVER_BASE_URL } from '~/config';
-import { useUserLookupAdminPanelMutation } from '~/generated/graphql';
+import { useUserLookupAdminPanelMutation } from '~/generated-metadata/graphql';
 
 import { currentUserState } from '@/auth/states/currentUserState';
 import { SettingsAdminTableCard } from '@/settings/admin-panel/components/SettingsAdminTableCard';

packages/twenty-front/src/modules/settings/admin-panel/components/SettingsAdminVersionContainer.tsx

@@ -2,7 +2,7 @@ import { SettingsAdminTableCard } from '@/settings/admin-panel/components/Settin
 import { SettingsAdminVersionDisplay } from '@/settings/admin-panel/components/SettingsAdminVersionDisplay';
 import { t } from '@lingui/core/macro';
 import { IconCircleDot, IconStatusChange } from 'twenty-ui/display';
-import { useGetVersionInfoQuery } from '~/generated/graphql';
+import { useGetVersionInfoQuery } from '~/generated-metadata/graphql';
 
 export const SettingsAdminVersionContainer = () => {
   const { data, loading } = useGetVersionInfoQuery();

packages/twenty-front/src/modules/settings/admin-panel/components/SettingsAdminWorkspaceContent.tsx

@@ -36,7 +36,7 @@ import {
   FeatureFlagKey,
   useImpersonateMutation,
   useUpdateWorkspaceFeatureFlagMutation,
-} from '~/generated/graphql';
+} from '~/generated-metadata/graphql';
 
 type SettingsAdminWorkspaceContentProps = {
   activeWorkspace: WorkspaceInfo | undefined;