BodyHealth - Locational Health & Damage

Added a new config option that allows using the /kill command to kill players with the KILL_PLAYER effect as that's more consistent across different server software than using the API

Added meta effects WHEN_DAMAGED & WHEN_HEALED. These allow triggering effects only when conditions are met due to the player taking damage or regenerating. For example, when_damaged/sound/minecraft:entity.bogged.hurt at effects.BODY.INTERMEDIATE would trigger the sound when the state of your body changes from NEARLYFULL to INTERMEDIATE (damage), but NOT when it changes from DAMAGED to INTERMEDIATE (regeneration).

Categorized effects into persistent, one-time and meta effects

Improved effect keyword matching to allow case-insensitive identifiers

Updated validation methods to reflect the above

Corrected config comments