v7.5.0: Windows mouse support!

The standout feature from this update is finally getting windows mouse support working, courtesy of @Tired-Fox!

Changelog

Additions

• Add support for Windows' mouse events (@Tired-Fox, #122)
• Add support for feeding input into getch

Refactor

• Allow immediately halting WindowManager programatically by not blocking on getch calls

Bugfixes

• Fix mouse event handlers not getting cleaned up properly