Remove all data that could be retrieved from ESO API from the save (title, body, medium, showTitle)

Author Orionik <orionik.eso@gmail.com>
Author date 2022-05-27 15:37:12
Author local date 2022-05-27 17:37:12 +0200
Committer Orionik <orionik.eso@gmail.com>
Committer date 2022-05-27 15:37:12
Committer local date 2022-05-27 17:37:12 +0200
Commit 3a04610329dc74a144e09444c5c2419f883191d9
Tree ff2585c0dbe7a8149a40011ed632ddc4d63c4529
Parent cc049685e1894735391080760245b9e604346850
Remove all data that could be retrieved from ESO API from the save (title, body, medium, showTitle)
Now that we have the bookId, we can retrieve them easily.
It lightens the save (we now are around 2MB for one character with all books) so it will help avoiding data corruption.
It also allow to fully support other language.
It has a small impact when loading the addon but nothing more.