feat(rxAppRoutes): Re-organized rxAppRoutes to live outside of rxApp.

BREAKING CHANGES:
- `rxAppRoutes` is now a factory. `encoreRoutes` is now the Encore specific service/instance for the default navigation.
  - All references to `rxAppRoutes` should be updated to use `encoreRoutes`
- `createInstance` function removed from 'rxAppRoutes'.