NuMem - safe(r) nogc memory managment

[ryuukk_]

> We plan to add more memory management utilities, thereby making 
> writing completely GC-less D code a lot more user-friendly.


I'd be happy to help

What D really is missing _right now_, and will hopefully get 
_before_ phobosv3 is a good and minimalistic Allocator API, i 
modeled mine around zig's, no RAII, just a simple struct with 3 
function ptr