Vue defer/Await functionality

[brophdawg11]

First pass for defer/Await in Vue

TODO:

• Error boundary not catching render errors
  • Unfortunately this is not going to be possible in the same fashion as React since Vue render errors throw to the parent of <Suspense>, so there's no way for us to catch them inside a nested <Await>
  • We can live with this for now, and eventually if we want an encapsulated Await+error boundary we may need to pull Suspense down inside so we can create the appropriate hierarchy