* react-app-env.d.ts is moved to the typings

* webpack config for development and production is updated

* extra browser router component is removed

* loable component is made

* spinner component is updated

* route are updated

* routes are imported is Loadable fashion with chunkName

* AppRoute is updated

* AppWrapper is changed to AppRouter

* merge conflits are resolved

* Loadable component is updated
Co-authored-by: Ankit Nayan <ankit@signoz.io>