Reusable healing potions

• Added a reusable variant of the normal healing potion. It keeps the same base item ID (auto-detected from loaded assets, defaulting to game:healing_potion) and is marked with custom metadata.
• Crafting: interact with an alchemy table while carrying at least 10 normal healing potions. Those potions are consumed and a reusable one is added with 3 charges.
• Using the potion heals you for 25% of your max health (minimum 1) per charge. Potion use is intercepted so the item is not consumed; charges drop with each use.
• Recharging: sleep/interact with the bed that is set as your spawn point. Any reusable healing potions in your inventory are reset to 3 charges.
• Inventory handling covers hotbar, utility, tools, armor, storage, and backpack slots when updating charges, crafting, and recharging.
• If the healing potion asset uses a different ID, update the detected ID in the code or add a matching asset name so the mod can find it.