[Fancy Zones] Middle click to toggle spanning multiple zones (#26079)

* Attempt to use middle click to toggle zone spanning

* Merge Middle and Secondary Button hooks

* Make mouse state variables more identifiable.

src/modules/fancyzones/FancyZonesLib/MouseButtonsHook.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <functional>
+
+class MouseButtonsHook
+{
+public:
+    MouseButtonsHook(std::function<void()>, std::function<void()>);
+    void enable();
+    void disable();
+
+private:
+    static HHOOK hHook;
+    static std::function<void()> middleClickCallback;
+    static std::function<void()> secondaryClickCallback;
+    static LRESULT CALLBACK MouseButtonsProc(int, WPARAM, LPARAM);
+};