[rewrite] Added shadcn ui to frontend and slightly tweaked backend

frontend/src/components/skip-to-main.tsx

@@ -0,0 +1,12 @@
+const SkipToMain = () => {
+  return (
+    <a
+      className={`fixed left-44 z-[999] -translate-y-52 whitespace-nowrap bg-primary px-4 py-2 text-sm font-medium text-primary-foreground opacity-95 shadow transition hover:bg-primary/90 focus:translate-y-3 focus:transform focus-visible:ring-1 focus-visible:ring-ring`}
+      href='#content'
+    >
+      Skip to Main
+    </a>
+  )
+}
+
+export default SkipToMain