feat: plugin: hw_info: added human-readable flag for memory info

[k0ste]

I'm bit confused, when I tried to debug build failure - I expected the worker memory to be less than 4GB, I was surprised when I saw 256MB. As it turned out, it was 256GB actually, I converted the bytes
The free program prints values in kibibytes by default. Not in bytes, that more than expected without flags

This PR add's --human flag, so that the plugin output for storage and memory has the same units. Currently, such a flag is set for storage

Show all output fields automatically scaled to shortest three digit unit and display the units of print out. Following units are used:
B = bytes
Ki = kibibyte
Mi = mebibyte
Gi = gibibyte
Ti = tebibyte
Pi = pebibyte

[xsuchy]

+1