AVX / AVX2 / AVX512 support

[delthas]

pev does not seem to support AVX (for example, vmovaps using ymm registers are listed as invalid).

It seems pev uses libudis86, which itself does not support AVX either.

Since this is a limitation in libudis86 it's unlikely pev will get support for this, but I'm opening the issue to make it easier for future users to know about this.

[merces]

Hi @delthas. Good catch. Actually, I had planned to remove disassembling capabilities from pev as there are other software that do a much better job on that. Will leave this issue here until we decide though. Thanks!