DojoLiga V7.5.0

DojoLiga V7.5.0 updates

• update to Java 21
• refactor DiscordAction to readable and maintainable
• add DojoTicketBot TicketManager separate module
• re-implement some League logic, refactor createArena action (swiss in works)

Authors:
@jalpp

V7.4.6

Public release for DojoLiga backend code, to allow Dojo community and other chess developers to contribute to Dojo's yearly Liga league system.

• Allows users to participate in Lichess/Chess.com leagues that run yearly
• Allows admins to create Lichess leagues and manage tournament leaderboard/calendar
• Sends users Lichess Liga reminders for ChessDojo

The code is licensed under GPL

Authors:
@jalpp @jackstenglein