RFC: Guide to offline-first and realtime sync with Hasura

We have a tutorial for building an offline first app with RxDB & Hasura at https://hasura.io/blog/building-an-offline-first-web-app-with-rxdb-hasura/

There is also a design guide (WIP) at: https://hasura.io/blog/p/1c5079be-d19e-4fd4-b700-2a6181f3fc40/

**Demos:**
Todo App: https://rxdb-hasura-demo.netlify.com/
Trello: https://trello-offline-first.netlify.com/

**Todo:**
For our RxDB tutorial, we're looking at adding a guide and best practices around:
1. Error handling: Patterns to detect sync errors and propagate that to the user
2. How to handle initial loading of a large amount of data
3. Showcase conflict resolution with Hasura (one with postgres, and one with actions)
4. Handle data modeling on RxDB (realtional vs nosql).

There is also https://github.com/pubkey/rxdb/issues/2048 that needs to be fixed.

**What else would you like to see from an offline first & realtime sync perspective?** Comments appreciated! 🙏

Start with the linked RxDB tutorial, WIP design guide, Todo and Trello demos, and RxDB issue #2048. Done would be a published offline-first and realtime-sync guide covering error handling, large initial loads, conflict resolution with Postgres and actions, and RxDB data modeling.

Written by the indexing model from the issue text.