Difficulty Tweak

Adds an extra difficulty layer to increase the stats of enemies (and also allies) Issues are tracked on my [Discord](https://discord.gg/czFkhSRjTb) in #difficultytweak-bugs as i dont have a github page. [Projectile Damage Attribute](https://modrinth.com/mod/projectile-damage-attribute) is a required dependency to buff certain ranged enemies Listed for 1.19/1.20 but older versions are just untested so try it if you want. Change difficulty with /function, Difficulties are as follows: Normal: Standard minecraft gameplay, just used to clear effects of other difficulties, Expert: All mob damage and move speed increased by 20%, All mob health increased by 50%, Master: All mob damage and move speed increased by 40%, All mob health increased by 100%, Death: All mob damage and move speed increased by 60%, All mob health increased by 150%,