Dispenspear

1. Added a custom advancement triggered when hit by a spear from a dispenser: "Point Taken" / “吹矛求刺”
2. Small adjustments to death messages

1. Added new custom death messages: 8 random, witty death messages each for English, Simplified Chinese, Traditional Chinese, and Classical Chinese (Wenyan). Fully server-side supported.
2. Enchantment Support: Spears now fully support the Knockback enchantment.
3. Damage now stacks when multiple spears strike a target simultaneously.
4. Switched spear sound effect from "Spear.Use" to "Spear.Attack".

Initial release. Expect potential bugs.