Raytrace Entity Tracker

[HaHaWTH]

Raytrace Entity Tracker uses async ray-tracing to untrack entities players cannot see,
which can reduce bandwidth usage significantly,
especially in some massive entities in small area situations.
 Also it provides a way to guard against Entity ESP hacks.

Experimental feature, more testers are needed( ´◔ ‸◔')

[ljys1216]

我很期待此分支，因为我的服务器带宽紧张，急需这个实验性功能

[TH2403y]

膜拜！佬！

[wg21655]

How can I test this is working correctly? I surrounded an entity but can still see it.