✨ Book completed toggle button and fix read again button

This should be good to merge once CI passes, a couple notes:

I added endpoints to query for a book's completion status AND a series' completion status
I added an endpoint for toggling a book's completion status
I added an unimplemented endpoint for toggling a series' completion status
- This will eventually mark each book in the series as read. I'll try and add that in sometime soon
Caught and fixed a couple of bugs related to prefetching, primarily the prefetch media and series queries. The TLDR; for those is the raw response, rather than just the data, was being cached, and the invalid type caused UI issues/errors

stumpapp / stump