…4665)

1. we need our redux actions for our telemetry middleware, which:
2. require types from an index file, which:
3. includes all of our model types, and everything involved in them

By moving these types to a separate file and importing _that_instead, we
bypass inclusion of 2 and 3 in our plugin, which equates to ~550kB (of a
total of ~600kB).