Add information about live interaction keys to Readme
**Describe the bug**
I cannot find information about the live action keys **H**ashrate, **P**ause, **R**esume, re**S**ults, Connection, h**E**alth of gpu

**To Reproduce**
Any person new to xmrig mining trying to find this information here.

**Expected behavior**
Have this information listed in the Readme file or wiki, along with the flag commands for ./xmrig

