Add taskbar visibility toggle mod

[roosmsg]

Summary

• Add taskbar-visibility-toggle mod to toggle taskbar visibility with Ctrl+Esc.
• Sticky state persists (shown/hidden) until toggled again.
• Optional setting to keep window sizes fixed (requires Windows auto-hide enabled).

How it works

• Hooks taskbar hide/unhide timers and tray unhide flow.
• Uses a low-level keyboard hook to intercept Ctrl+Esc and block Start menu.
• Updates auto-hide state when needed to keep window sizing consistent.

Testing

• Manual: toggled Ctrl+Esc; taskbar hides/shows as expected.
• Manual: with Windows auto-hide enabled + “Keep window sizes fixed”.

[m417z]

I tried this mod on my Windows 11, and it didn't work reliably for me. Most of the time, Ctrl+Esc just opened/closed the start menu. It seems that the state != ToggleState::ForcedHidden condition isn't true most of the time for me. Does it work for you? Or am I missing something?

Also, I noticed that it doesn't work when Windhawk is on the foreground since Windhawk is running as administrator. I found it confusing, you might want to add a note about it.