Update Code structure and fixing some minor bugs

New Features:

• Added /ability random – instantly morph into a random class.
• Added Randomizer Item – reroll your class by using a special item.
• The Randomizer Item is fully configurable:
  - name
  - lore
  - custom model data
  - optional glow effect.
• Added /ability give Randomizer – give yourself (or players) the reroll item.

Permissions:

• Code (Text):

  ability.random
  – required for both the command and the item.

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This version fixes issues with Spigot servers, where they struggle with reading the version of the plugin

The long-awaited GUI has arrived!
Now you and your players can browse all ability classes with /ability gui!
Permissions support included. Only see the classes you have permission for!

• NEW: /ability gui opens an interactive menu for browsing and selecting classes!
• Permissions: Show/hide classes via permissions: ability.class.<class>
• Tab-Completion: /ability gui and all subcommands now support tab-completion
• Quality of Life: Skills can now read configuration fields more flexibly (e.g. block types for walls)
• Fixes: Many bugfixes and YAML improvements for advanced skill setups
• Code cleanup and documentation added for easier editing!

How to use:

• Open the GUI: Type /ability gui
• Select a class: Just click the class icon!
• Permission nodes: Use ability.class.<class> to control class access/visibility

Updating?
Just replace your old .jar with the new one.
No config changes required, but more options are available in your class YAMLs!