refactor: rename application from JSON Visualiser to DevLab

- Updated the title and references throughout the application to reflect the new name, DevLab.
- Adjusted the About, Contact, Home, and JSON Viewer pages to align with the rebranding.

src/layout/hero-layout/index.tsx

@@ -17,7 +17,7 @@ export default function HeroLayout() {
           <div className="flex justify-between items-center h-16">
             <div className="flex items-center">
               <h1 className="text-xl font-semibold text-gray-900">
-                JSON Visualiser
+                DevLab
               </h1>
             </div>
             <nav className="flex space-x-8">