Add Turso/Vercel deployment configuration

- Updated database connection to support Turso auth token
- Added vercel.json with bun build configuration
- Updated environment schema for production deployment
- Added new features and components for production readiness

src/app/invoices/layout.tsx

@@ -0,0 +1,20 @@
+import { Navbar } from "~/components/Navbar";
+import { Sidebar } from "~/components/Sidebar";
+
+export default function InvoicesLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <>
+      <Navbar />
+      <div className="flex">
+        <Sidebar />
+        <main className="flex-1 min-h-screen bg-background">
+          {children}
+        </main>
+      </div>
+    </>
+  );
+}