feat(*): allow to select auth providers + add multiworkspace with subdomain management (#8656)

## Summary
Add support for multi-workspace feature and adjust configurations and
states accordingly.
- Introduced new state isMultiWorkspaceEnabledState.
- Updated ClientConfigProviderEffect component to handle
multi-workspace.
- Modified GraphQL schema and queries to include multi-workspace related
configurations.
- Adjusted server environment variables and their respective
documentation to support multi-workspace toggle.
- Updated server-side logic to handle new multi-workspace configurations
and conditions.

packages/twenty-front/src/modules/auth/states/signInUpModeState.ts

@@ -0,0 +1,7 @@
+import { createState } from 'twenty-ui';
+import { SignInUpMode } from '@/auth/types/signInUpMode.type';
+
+export const signInUpModeState = createState<SignInUpMode>({
+  key: 'signInUpModeState',
+  defaultValue: SignInUpMode.SignIn,
+});