Partial-Keep-Inventory

Initial release.

• Keeps shulker boxes, tools, weapons, armour, and elytra on death
• All other items drop normally
• Kept items restored to original inventory slots
• Armour re-equipped on respawn with configurable durability penalty (~3% per death)
• Configurable XP level loss on death (default 1-5 levels)
• Configurable item whitelist (ender chests, bundles by default)
• All behaviour configurable via config file