TODO

embrace OOP
use xdg-config-dir for things like colors/intervals
add an interval mode; log stats to logging widget occasionally
binding/method to save log to text file
add vram stats: used / total
add unit toggle/binding; Ghz can be fairly vague - users may prefer Mhz/Hz
- tldr: may be wanted for precision
- driver provides hertz, with modern cards is fairly excessive
- conversion is done using format_frequency
  - a wrapper of format_size from humanfriendly
  - (currently) defaults to highest sensible unit, changing on scale.
  - often flipping between 500Mhz / 2.6Ghz where consistency may be preferred
address assumptions on some statistic files
- Clocks:
  - core/memory assumed provided by freq1_input and freq2_input respectively
  - nearby files named freq*_label can determine this reliably
- Voltage:
  - similarly, in0_input is the assumed voltage file
  - indicated by in*_label with vddgfx inside
  - no accounting for other voltage files currently; APUs/other cards may differ
argparse extensions
- restore --card / -c under argparse
  - to skip amdgpu device detection
  - will expect cardN or renderANNN from /dev/dri/
  - provides the (AMD) GPU intended to be monitored
  - may require card/hwmon detection be separate tasks
- preferred unit for clocks