## TODO
- 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
- restore `argparse`
- primarily: `--card` / `-c`, to skip `amdgpu` device detection
- will expect `cardN` or `renderANNN` from `/dev/dri/`
- provides the (AMD) GPU intended to be monitored
- secondarily:
- preferred unit for clocks
- perhaps an update interval for the Textual stat-updating timers
