[adil192]

This builds on top of #601 to add power readings from powercap interfaces including intel-rapl.

Closes #602, closes #223

Caveats:

• Does not set the power-group value. The header says "No data" if hwmon doesn't expose power readings (like on my laptop).
• The padding in the panel is missing, not sure why.
• I've only tested on my Intel laptop. Not sure how/if this works with AMD. Update: Miraculously, intel-rapl works on AMD too!
• Merge Add Power category for hwmon power sensors #601 before this PR, since this is branched off it.
  View the diff with https://github.com/corecoding/Vitals/pull/609/changes/b1caf2d40592515ad905fba628890888e01914c6..HEAD
• I feel like my code is a bit hacky. If you have suggestions to clean it up, I'm very open to feedback

And it works when charging (when we can't use the battery discharge rate):

[adil192]

They have human readable names, I'll add them:

❯ for f in /sys/class/powercap/*/name; do echo "$f:     $(cat $f)"; done
/sys/class/powercap/intel-rapl:0:0/name:        core
/sys/class/powercap/intel-rapl:0:1/name:        uncore
/sys/class/powercap/intel-rapl:0:2/name:        dram
/sys/class/powercap/intel-rapl:0/name:          package-0
/sys/class/powercap/intel-rapl:1/name:          psys
/sys/class/powercap/intel-rapl-mmio:0:0/name:   dram
/sys/class/powercap/intel-rapl-mmio:0/name:     package-0

Update: Done and screenshot updated above.

[corecoding]

I am prepping the current development branch for release, this will be in the following release for sure! This is a great feature.