[FEATURE REQUEST] State module to manage SysFS entries

[piterpunk]

Is your feature request related to a problem? Please describe.
There are some Linux kernel configuration that are managed through SysFS objects, it's not uncommon to need change those configurations, like disable transparent hugepages, or change disks I/O scheduler, or to offline some CPUs.

Saltstack provides the sysfs execution module, but not a state module so I could set and keep the configurations in the desired state.

Describe the solution you'd like
I would like a state module so I can specify something like:

bus/cpu/devices/cpu1/online:
  sysfs.present:
    - value: 0

And Salt will check the cpu1 state, do nothing if it was already disabled and disable it if enabled.

Describe alternatives you've considered
I considered read the SysFS file contents , and use its results to trigger another state that runs sysfs.write or directly echoing the value to the file using cmd.run.

Please Note
If this feature request would be considered a substantial change or addition, this should go through a SEP process here https://github.com/saltstack/salt-enhancement-proposals, instead of a feature request.