Epic: Update to Vue 3

[dpaquette]

Pending the release of Vuetify 3, we would like to update the 2wr-app to Vue 3.

[shawnwildermuth]

Release of Vuetify 3 has been the sticking point. Is it close?

[dpaquette]

It is getting close! The Beta is expected in December and the official release in February. Reference: https://vuetifyjs.com/en/introduction/roadmap/

We could consider starting this work in December targeting the Beta although I generally prefer to target stable bits in HTBox projects :-)