feat: Implement PDF to Markdown conversion with a new UI built using Shadcn/UI and updated styling.

src/components/navbar.tsx

@@ -0,0 +1,24 @@
+import Link from "next/link";
+import { FileText, Github } from "lucide-react";
+import { Button } from "./ui/button";
+
+export function Navbar() {
+    return (
+        <div className="fixed top-4 left-0 right-0 z-50 flex justify-center px-4">
+            <nav className="flex items-center justify-between w-full max-w-4xl px-4 py-2 bg-background/80 backdrop-blur-md border border-border/50 rounded-full shadow-lg">
+                <Link href="/" className="flex items-center gap-2 px-2 hover:opacity-80 transition-opacity">
+                    <FileText className="w-5 h-5 text-primary" />
+                    <span className="font-semibold tracking-tight">PDF2MD</span>
+                </Link>
+                <div className="flex items-center gap-2">
+                    <Button variant="ghost" size="icon" asChild className="rounded-full">
+                        <Link href="https://github.com/soconnor0919/pdf2md" target="_blank" rel="noopener noreferrer">
+                            <Github className="w-5 h-5" />
+                            <span className="sr-only">GitHub</span>
+                        </Link>
+                    </Button>
+                </div>
+            </nav>
+        </div>
+    );
+}