[Feature Request] Add ability to change CPU governor

[PeterPgit]

In #195, you mentioned that Ryzen CPUs had issues with frequency scaling. I am running a Ryzen CPU as well (AMD Ryzen 5 5600H) and initially had problems with getting the frequency scaling to work as any changes would be ignored. However, I was testing another program called cpupower-gui, and in that I was able to set the governor to conservative (it appears anything other than Schedutil worked as well). Once I applied that change, the frequency scaling and profiles now all work as expected.

Also a noobie so I'm not sure if the OP in the other thread was having the same issue, but I'd thought I should at least bring up what got it working for me for future reference.