Mac: Clear mouse state on windowDidEndLiveResize event

[moomerman]

Hook into the windowDidEndLiveResize event and emit the Event_Window_Unfocused event which resets the state of the mouse (and other inputs).

Wasn't sure if we want to have another specific event for this, the Event_Window_Unfocsed event currently does what we want.

Screen.Recording.2026-01-31.at.10.38.03.mov

Fixes #31

[karl-zylinski]

Thanks for the PR. Yes, it is a bit weird that it uses the Unfocused event.

An idea that may or may not work: Check for the liveResizeStart event and if you are in a live resize, then only send the Event_Screen_Resize event when the live resize ends. This should also cause less backbuffer resize spam. But perhaps that doesn't solve the mouse button getting stuck? Perhaps we need a Window_Event_Reset_Input or something like that. I'm not 100% sure