LifeSteal datapack

Found bug / order datapack / other - Discord.

Adds Heart system from LifeSteal SMP

Version 1.1:

* Maximum 20 Hearts * Killing a player gives Heart * Command withdraw takes your Heart * At start usually 10 Hearts * Heart is knowledge book * Heart craft

Version 1.2:

* Customizable amount of maximum hearts * Customizable amount of starting hearts * Heart is now with texture pack

Withdraw command: ``` /trigger withdraw /trigger withdraw set <count> ``` Customize maximum and starting hearts (this is necessarily to write on v1.2): ``` /function lifesteal:options {"heartsMax":20,"heartsBase":10} ```

Tips: * If you use a Heart item when you already have 20 hearts, then it may visually disappear. Either update the slot or rejoin. * Although I tried to do it without errors, still don't use too many hearts in 0.05 seconds.