(feat): add cache package

(feat): improve local storage security
(feat): move settings to dedicated settings package

packages/settings/src/pages/index.tsx

@@ -0,0 +1,7 @@
+import { useIsMobile } from "@tensamin/ui";
+import { SettingsSidebar } from "../layout";
+
+export default function Page() {
+  const isMobile = useIsMobile();
+  return isMobile && <SettingsSidebar />;
+}