This refactoring allows third-party mods to provide their own custom GUI
for ability type settings by extending SubGuiAbilityConfig.
Changes:
- Refactored SubGuiAbilityConfig as base class with GuiMenuTopButton tabs
- Added virtual methods: initTypeTab(), handleTypeButton(), handleTypeTextField()
- Added createConfigGui() method to Ability base class for GUI instantiation
- Created 15 SubGuiAbility* subclasses in new ability package
- Updated GuiNPCAbilities and GuiNpcManageAbilities to use ability.createConfigGui()
Third-party mods can now:
1. Create a custom Ability subclass
2. Extend SubGuiAbilityConfig with their own GUI
3. Override createConfigGui() to return their custom GUI