* Add 1.9+ PvP 'Cooldown'
This commit adds a subtitle that acts as the Java cooldown. This is an optional feature disabled in the config with `show-cooldown`. This does not appear on plugins that use OldCombatMechanics.
* No need to bump up the config version; I was just tested with OldCombatMechanics
* Use simpler casting
* Use session variable of lastHitTime for theoretically better performance
* Reuse attribute value calculation from AttributeUtils
* Remove unused imports
* Revert config version update in config.yml
* Configuration updates
The main feature of this commit is switching Bukkit and BungeeCord to using Jackson configuration. This allows comments to load. Along with this, the Jackson configs have been consolidated into one abstract class, and a check is made to ensure auth-type cannot be set to Floodgate if Floodgate is not installed.
* Add deleted file; remove imports
* Re-add changing of Bukkit port
* Alphabetize import
* Alphabetize Bungee import
* Updates
* Swap values in GeyserJacksonConfiguration
* Add a null check for GeyserConnector in Bukkit's onDisable
