feat: add system76-io driver

[ssweeny]

This PR adds the drivers for the System76 IO board used in their Thelio desktops. These drivers, along with the system76-power daemon allow proper fan control on the desktop rather than having the fan go full blast all day.

• The upstream source is here: https://github.com/pop-os/system76-io-dkms
• I repackaged the driver as an akmods package here: https://github.com/ssweeny/system76-io-akmod
  • (I should note here that I have some experience with packaging for Linux, but more on Debian and Yocto, and this is my first RPM packaging effort in maybe 20 years so if anyone would like to take a look at my spec file and offer tips that would not be unwelcome 😅 That said, things seem to be working in my local testing.)
• The package resides in my Copr: https://copr.fedorainfracloud.org/coprs/ssweeny/system76-hwe/