Add horizonal scroll wheel support to Mouse

[walbourn]

The original XNA Game Studio Mouse abstraction only exposed the vertical scroll wheel as most mice don't have the horizonal scroll wheel. The information, however, is exposed for Win32, UWP, and GameInput.

This work would likely modify Mouse::State to have 2 scroll wheel values:

struct State
{
...
    int     scrollWheelValueX;
    int     scrollWheelValueY;
...
};

This would be a minor breaking change.

And the reset method would be updated to:

// Resets the accumulated scroll wheel value
void __cdecl ResetScrollWheelValue(bool x=true, bool y=true) noexcept;

The Win32 integration would also require getting WM_MOUSEHWHEEL messages.

[walbourn]

In the meantime, I did fix a bug where the UWP Mouse implementation would combine both the X and Y wheels together. This is fixed in this commit.

[walbourn]

Prototyped in this branch, but needs more testing https://github.com/microsoft/DirectXTK12/tree/mousehwheel