add role assignment page (#10115)

## Context
This PR introduces the "assignment" tab in the Role edit page, currently
allowing admin users to assign workspace members to specific roles.

Note: For now, a user can only have one role and a modal will warn you
if you try to re-assign a user to a new role.

## Test
<img width="648" alt="Screenshot 2025-02-10 at 17 59 21"
src="https://github.com/user-attachments/assets/dabd7a17-6aca-4d2b-95d8-46182f53e1e8"
/>
<img width="668" alt="Screenshot 2025-02-10 at 17 59 33"
src="https://github.com/user-attachments/assets/802aab7a-db67-4f83-9a44-35773df100f7"
/>
<img width="629" alt="Screenshot 2025-02-10 at 17 59 42"
src="https://github.com/user-attachments/assets/277db061-3f05-4ccd-8a83-7a96d6c1673e"
/>

packages/twenty-front/src/modules/app/components/SettingsRoutes.tsx

@@ -267,12 +267,14 @@ type SettingsRoutesProps = {
   isBillingEnabled?: boolean;
   isFunctionSettingsEnabled?: boolean;
   isAdminPageEnabled?: boolean;
+  isPermissionsEnabled?: boolean;
 };
 
 export const SettingsRoutes = ({
   isBillingEnabled,
   isFunctionSettingsEnabled,
   isAdminPageEnabled,
+  isPermissionsEnabled,
 }: SettingsRoutesProps) => (
   <Suspense fallback={<SettingsSkeletonLoader />}>
     <Routes>
@@ -308,8 +310,15 @@ export const SettingsRoutes = ({
         element={<SettingsObjectDetailPage />}
       />
       <Route path={SettingsPath.NewObject} element={<SettingsNewObject />} />
-      <Route path={SettingsPath.Roles} element={<SettingsRoles />} />
-      <Route path={SettingsPath.RoleDetail} element={<SettingsRoleEdit />} />
+      {isPermissionsEnabled && (
+        <>
+          <Route path={SettingsPath.Roles} element={<SettingsRoles />} />
+          <Route
+            path={SettingsPath.RoleDetail}
+            element={<SettingsRoleEdit />}
+          />
+        </>
+      )}
       <Route path={SettingsPath.Developers} element={<SettingsDevelopers />} />
       <Route
         path={SettingsPath.DevelopersNewApiKey}