[FEATURE] - Privacy screen v2.

[bitbound]

The current implementation of privacy screen in ControlR is unable to keep the privacy screen above certain Windows 11 elements.

Primarily, when the Start menu is open, the menu and taskbar will move above the privacy screen in the z-order. Normal Win32 APIs like SetWindowPos are incapable of bringing the privacy screen above these, as they exist in different bands.

Other remote control solutions employ various other methods for privacy screen. RustDesk, for example, has a few different implementations. One of which appears to make a copy of RuntimeBroker.exe and injects a DLL into it. And another that uses a virtual display driver.

I'd prefer to find a more simple solution, if possible. One reason is to maximize my dev time across all the features I need to build. Another is following my core goals of keeping dependencies and system changes minimal.