v1.3.0 Difficulty-specific triggers and new GUI integration tool

Mod Changelog:

• Added ability to load difficulty-specific triggers for all difficulties
  • Please look at the README file for a note on the loading order.

Integration Tool Changelog:

• Added the ability to remove integrated data
• Added difficulty-specific integration/extraction/removal
• Created a GUI version of the tool using iced
  • The GUI version is available as a crate feature