feat: add interface user permission (#20424)

* feat: add interface user permission

Adds admin configurable user / group permissions for the interface settings section

* rename

src/lib/components/chat/SettingsModal.svelte

@@ -487,6 +487,10 @@
 				);
 			}
 
+			if (tab.id === 'interface') {
+				return $user?.role === 'admin' || ($user?.permissions?.settings?.interface ?? true);
+			}
+
 			return true;
 		});
 	};