feat(app.tsx): refactors the app.tsx routes to lazy load the components.

[taos15]

This pull request refactors the app routes to lazy load the components, improving performance and reducing initial bundle size.

[schroda]

default exports won't be introduced to the code base again, either do it with named exports or don't do it at all and don't create a massive pr which introduces lazy loading everywhere, split it up and create small prs