Title: Add two Treasure Enchantments for Spear: Lightness and Burst

Problem: The Spear is currently in an awkward spot. Within 4.5 blocks, it deals no damage or knockback. It’s useless when enemies get close. Also, the charge duration is too short and the cooldown is slow (especially noticeable on Bedrock). Suggestion: Add two new Treasure Enchantments. 1. Lightness (I - III) · Treasure enchantment (cannot be obtained from Enchanting Table). · Extends the duration of the charge state. · Speeds up the attack cooldown recovery (great for Bedrock Edition, which has no attack cooldown bar). · Reduces hunger consumption when charging. 2. Burst (I) · Treasure enchantment (rare). · Fixes the close-range weakness: within 4.5 blocks, both the charge and thrust attacks will now deal damage and apply knockback. · This gives the Spear a fighting chance when enemies close the distance. Why this is balanced: These enchantments don't increase raw damage. They just fix the weapon's clunky handling and its fatal flaw of being useless at close range. Similar to how Mace got Wind Burst, the Spear deserves its own unique identity.