feat: integrate PWA support using next-pwa; update configuration in next.config.ts, add service worker files to .gitignore, and include manifest in layout.tsx

next.config.ts

@@ -1,4 +1,10 @@
 import type { NextConfig } from 'next'
+const withPWA = require("@ducanh2912/next-pwa").default({
+  dest: "public",
+  register: true,
+  skipWaiting: true,
+  disable: process.env.NODE_ENV === "development",
+});
 
 const nextConfig: NextConfig = {
   reactStrictMode: true,
@@ -17,4 +23,4 @@ const nextConfig: NextConfig = {
   },
 }
 
-export default nextConfig
+export default withPWA(nextConfig)