Add shadcn components, basic layout and default design

src/components/global/TopNav.tsx

@@ -0,0 +1,18 @@
+"use client"
+
+import { NavigationMenu, NavigationMenuItem, NavigationMenuLink, NavigationMenuList, navigationMenuTriggerStyle } from "@/components/ui/navigation-menu";
+import Link from "next/link";
+
+export default function TopNav() {
+  return (
+    <NavigationMenu viewport={false}>
+      <NavigationMenuList>
+        <NavigationMenuItem>
+          <NavigationMenuLink asChild className={navigationMenuTriggerStyle()}>
+            <Link href="/">Home</Link>
+          </NavigationMenuLink>
+        </NavigationMenuItem>
+      </NavigationMenuList>
+    </NavigationMenu>
+  );
+}