[Medium term] Better system for character identification.

[pashpashpash]

Right now users have to create a "profile reference" PDF that has an example profile reference page for the manga. Then as part of the "identify important_pages" step, GPT vision is used to identify a character profile page within the volume. This is far from ideal, as it slows down the time it takes for a user to run the script both in terms of extra setup and slow GPT vision processing time. This is far from ideal.

Perhaps this can help:
https://github.com/ragavsachdeva/magi

I'm happy for other ideas on how to improve this.