Support json-schema import

[DominikGuzei]

I'm very excited about trying out Hasura with RxDB like described in your great blog post https://hasura.io/blog/building-an-offline-first-web-app-with-rxdb-hasura but one drawback I see is that there is no schema workflow to sync Hasura with RxDB json-schema … so my question here is why not support json-schema instead of an ad-hoc custom transform?