This logic is the same on both platforms and can be reused. Later in the stack I'm going to introduce the logic for thick thread fetching to this hook.

https://linear.app/comm/issue/ENG-8706/modify-message-lists-to-call-the-new-function

Depends on D13142

Tested on both native and web whether threads with less than 20 messages are displayed correctly and fetching all the messages, in batches, works for longer threads.