cpu affinity for go goroutine

pin goroutine to cpu core , linux / unix only, for testing and research

1. code copyright and refence

/goine fork from https://github.com/jandos/gofine by Zhandos Zhylkaidar ( jandos ). --- unix only

/affinity copy from https://pythonwise.blogspot.com/2019/03/cpu-affinity-in-go.html by Miki Tebeka --- linux only

https://github.com/rakyll/go-numa

2. DO NOT use in product

Do not use in product, ASIS

3. example

check example path