` %%` and `%%=` operators not implemented

[ZeWaka]

This is a newer version of the % operator that supports all numbers, not just integers. It is equivalent to B * fract(A / B). The % operator does the same thing, but truncates A and B to integers first.

https://www.byond.com/docs/ref/#/operator/%25%25 https://www.byond.com/docs/ref/#/operator/%25%25=