Add an ability to automatically kill entities

[Im-CatDev]

Describe your suggestion

Just like #follow command you should be able to select a player or an entity (probably only passive mobs)

Settings

doCrits = will do critical hits in a not legit way (some packet magic)
doCritsLegit = will do critical hits in a legit way (jump and hit)

Context

Sometimes you need some food, and don't feel like killing animals manually, you can do #kill entity pig and get food

Final checklist

• I know how to properly use check boxes
• I have not used any OwO's or UwU's in this issue.