Feature Request: allow disabling CFS tweaks

[BayLee4]

It would be great to allow disabling CFS tweaks, as it would help when it's already handled manually, or more simply when one doesn't want to change the default which comes with its kernel.

A use_cfstweaks: true|false in the config.ron would be perfect

[mmstick]

A new config format will be used that will look like this:

// CFS latency adjustments
cfs enable=true {
    default latency=6 nr-latency=8 wakeup_granularity=1.0 bandwidth-size=5 preempt="voluntary"
    responsive latency=4 nr-latency=10 wakeup_granularity=0.5 bandwidth-size=3 preempt="full"
}