A bunch of initial fixes and some new features 🤖

Features

Added a search field within creature categories to filter out what creatures are shown incase there's a lot of them.
A creature's name is now hidden by default and be revealed by the GM. If it's not revealed it's shown as "Unknown Creature".
Properly added english localization.

Fixes

There was a bug caused by poor function naming on my part that caused some issues, like being unable to open up spellsheets anymore 😱.
Foundry's Dark Mode styling was causing the bookmarks of the Bestiary to disappear. This fix should make Dorako and Pathfinder UI functional aswell. Actually making the colour scheme better for them will be a later matter though.
Creatures that are in multiple categories weren't having their data link. Should be fixed!

..and a bunch of other things I can't recall fixing up!
Thanks for all the positivty I've gotten with this module so far 😄