refacto(*): remove everything about default workspace (#9157)

## Summary
- [x] Remove defaultWorkspace in user
- [x] Remove all occurrence of defaultWorkspace and defaultWorkspaceId
- [x] Improve activate workspace flow
- [x] Improve security on social login
- [x] Add `ImpersonateGuard`
- [x] Allow to use impersonation with couple `User/Workspace`
- [x] Prevent unexpected reload on activate workspace
- [x] Scope login token with workspaceId 

Fix https://github.com/twentyhq/twenty/issues/9033#event-15714863042

packages/twenty-front/src/pages/settings/admin-panel/SettingsAdmin.tsx

@@ -1,14 +1,10 @@
-import { SettingsAdminImpersonateUsers } from '@/settings/admin-panel/components/SettingsAdminImpersonateUsers';
-import { SettingsCard } from '@/settings/components/SettingsCard';
 import { SettingsPageContainer } from '@/settings/components/SettingsPageContainer';
 import { getSettingsPagePath } from '@/settings/utils/getSettingsPagePath';
 import { SettingsPath } from '@/types/SettingsPath';
 import { SubMenuTopBarContainer } from '@/ui/layout/page/components/SubMenuTopBarContainer';
-import { useTheme } from '@emotion/react';
-import { IconFlag, UndecoratedLink } from 'twenty-ui';
+import { SettingsAdminContent } from '@/settings/admin-panel/components/SettingsAdminContent';
 
 export const SettingsAdmin = () => {
-  const theme = useTheme();
   return (
     <SubMenuTopBarContainer
       title="Server Admin Panel"
@@ -21,18 +17,7 @@ export const SettingsAdmin = () => {
       ]}
     >
       <SettingsPageContainer>
-        <SettingsAdminImpersonateUsers />
-        <UndecoratedLink to={getSettingsPagePath(SettingsPath.FeatureFlags)}>
-          <SettingsCard
-            Icon={
-              <IconFlag
-                size={theme.icon.size.lg}
-                stroke={theme.icon.stroke.sm}
-              />
-            }
-            title="Feature Flags"
-          />
-        </UndecoratedLink>
+        <SettingsAdminContent />
       </SettingsPageContainer>
     </SubMenuTopBarContainer>
   );