Feature flags env variable gating (#9481)

closes #9032

---------

Co-authored-by: Antoine Moreaux <moreaux.antoine@gmail.com>

packages/twenty-front/src/modules/client-config/states/canManageFeatureFlagsState.ts

@@ -0,0 +1,6 @@
+import { createState } from 'twenty-ui';
+
+export const canManageFeatureFlagsState = createState<boolean>({
+  key: 'canManageFeatureFlagsState',
+  defaultValue: false,
+});