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/page/contact/index.tsx

@@ -23,7 +23,7 @@ export default function Contact() {
 ${message}
 
 ---
-*Generated via JSON Visualiser Contact Page*
+*Generated via DevLab Contact Page*
     `.trim()
 
     const githubUrl = `https://github.com/${owner}/${repo}/issues/new?title=${encodeURIComponent(