Duels Optimised v7.4

Added Leave command
Some bug fixes
https://github.com/dumbo-the-developer/Duels/compare/7.3...7.4

Full changelog https://github.com/dumbo-the-developer/Duels/compare/7.0...7.3

Fixed reload issue that happened in v7.0

• Introduced a new teleportToLobby method in the Duels interface to teleport players to the lobby.
• Implemented the method in DuelsPlugin with thorough null checks.
• Introduced hasUsableTotem method to verify if a player has a totem equipped in their main or off hand.
• Updated round-ending logic to account for potential totem protection against lethal damage.
• Updated CommandsConfig to handle unset or empty alias configurations correctly.
• Added unregisterPluginCommands in DuelsPlugin to clean up stale command entries during plugin unload.
• Introduced average_rating and avg_rating placeholders in PlaceholderHook.
• Implemented averageRating method to calculate the average rating across all kits.
• Prevent cursor-held items from being included in death drops during duels
• Added checks in Teleport to handle players sleeping or inside vehicles.
• Adjusted DuelManager to use setHealth(0) for ending matches instead of manually restoring player state, avoiding corruption risks.
• Introduced duel cooldown configuration in config.yml.
• Added SelfCooldownValidator and TargetCooldownValidator to validate duel cooldowns.
• Updated User and UserData to handle cooldown timestamps and implement cooldown logic.
• Integrated cooldown checks and enforcement in DuelManager, RequestManager, and related classes.
• Updated lang.yml with new message for players in cooldown.

• Added support for configurable button types, slots, and glow effects in config.yml.
• Refactored button constructors to utilize new configuration options for button types and data.
• Introduced glowing button support with hidden enchantments.

• Improve queue matching logic by skipping unnecessary attempts when no arenas are available.
• Update KitEditListener to prevent stack splitting during kit editing.

Fixed startup errors where plugin was saying to contact author due to bad relocation of folialib.

Fixed an issue where players were losing inventory on quitting