full-screen-api.ignore-widgets functionality but for all windows

### Description of the new feature / enhancement

If you go to about:config in FireFox and search for the setting "full-screen-api.ignore-widgets", and set it to true, if you then full-screen (F11 or maximise a video) while the window is snapped to a FancyZone, it treats the zone itself as the full screen.

It's **incredibly** useful.

Please make this functionality native to FancyZones so that it works for **all** programs please!!

### Scenario when this would be used?

For example if I have multiple trading windows setup across multiple zones, I want to full screen those to maximise my screen real estate as all the window UI is wasting space. I want to be able to snap different programs into different zones and run them in full screen in their zones.

### Supporting information

_No response_

No PowerToys files or tests are named. Start by reproducing the Firefox behavior with a window snapped to a FancyZone, then inspect how FancyZones handles fullscreen and maximized-window events. Done means fullscreen-capable programs can hide their window UI while remaining confined to their assigned zones.

Written by the indexing model from the issue text.