We had an error boundary at the top level of the app, but it didn't
work because it used ErrorPage which tried to use a bunch of things
like useLocation() and an error prop. Also it wasn't passed in correctly
anyway.
This wires it up correctly to a separate view with a button to send
debug logs, and also moves it down a few layers so it has access to
enough things to be able to send rageshakes.
Related: https://github.com/vector-im/element-call/issues/421
