Allow developer to choose between the classic vue-router implementation and the one with unplugin-vue-router

I created a project using `create vuetify` and I chose the base config (Default + Router). I didn't expect unplugin-vue-router to be added, and since our team is not confident on using it we now have to manually remove the dependency and everything related to it.
It would be awesome to choose to use it or not directly from the "wizard".