Update app title to WeddingOs from Create Next App

src/app/layout.tsx

@@ -1,4 +1,4 @@
-import type { Metadata } from "next";
+import type { Metadata, Viewport } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
 import { Toaster } from "@/components/ui/sonner"
@@ -14,8 +14,12 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: "Create Next App",
-  description: "Generated by create next app",
+  title: "WeddingOs",
+  description: "Düğün Salonu Yönetim Sistemi",
+};
+
+export const viewport: Viewport = {
+  themeColor: "#7920df",
 };
 
 export default function RootLayout({