[Feature]: Make default configuration not affect vanilla mechanics/gameplay.

[vLuckyyy]

The default configuration of EternalCombat should not change vanilla Minecraft gameplay or mechanics. After installing the plugin with the default config, the server should behave as close to vanilla as possible.

All features that alter gameplay (combat behavior, restrictions, penalties, etc.) should be disabled by default or configured in a neutral way. Server owners should explicitly enable mechanics if they want them.