Custom Tooltip API

This update adds an API for developers, some QOL additions and an important bug fix.

Additions:

• Added an actual API for developers, no need to edit tooltips in-game or by using the JSON5 file anymore

• The custom tooltip now shows up above your hotbar if it replaces the item's name

• Added a confirmation screen to the delete tooltip button

• Added a duplicate tooltip button

Fixes:

• Default config (the sword tooltip) does not regenerate anymore if all entries are deleted, only if file is deleted