Introducing: UI and Language

The Trading system now also supports whatever languages you add and configure. The plugins now also features an exciting new UI for user settings and language settings.

Admins can create, edit, reset and delete languages as they see fit. An overview of the permissions can be found below. If the player is a server operator, all permission checks are bypassed automatically.

Changelog:
- Trade preferences are now implemented
- Added auto-collect items post-trade
- Added intended lore to Auto-Collect items in Trade Settings Inventory
- Added Language Settings and Edit Inventories for Admins
- Implemented everything as need be
- Implemented Language Command:
- /trade language <create/reload/edit/reset/delete> <langCode> [for create: LanguageName]
- /trade - Opens the Trade Settings

Permission Overview:
- trading.admin.language.* - All of them
- trading.admin.language.create - Create Languages
- trading.admin.language.reload - Reload Languages
- trading.admin.language.edit - Edit Languages / See the edit screen
- trading.admin.language.reset - Reset Languages
- trading.admin.language.delete - Delete Languages (not the main one)

- See the full changelog here: https://github.com/Just1Developer/MC_TradingSystem/releases/edit/RELEASE_v1.0_spigot_1.16-1.20