Power Monitor refresh rates

### Description of the new feature / enhancement

It would be nice to have a function to change refresh rate for monitors. For each profile each refresh rate setting.

### Scenario when this would be used?

I have 280hz monitor. But when i watch movies or youtube I turn 60hz to make it easier on monitor.

### Supporting information

_No response_

No files, tests, or entry points are named. Start by locating the Power Monitor implementation and the existing monitor-setting integration, then clarify how refresh rates should be stored and applied per profile. Done should mean profiles can select refresh rates and the behavior works for the described movie and YouTube scenario.

Written by the indexing model from the issue text.