Incorporate "Stackie/Clumps" type mechanic to Hodgepodge

[PlayfulPiano]

Mod for reference (MIT License): https://www.curseforge.com/minecraft/mc-mods/stackie

Basically the precursor to the more modern mod "Clumps": https://www.curseforge.com/minecraft/mc-mods/clumps

The mechanic in question is having exp orbs (and possibly item drops in general) stack to single entities when nearby, as to decrease potential lag from mob farms or other item dropping-mechanics.