FancyZones and Shortcut Guide initial commit

Co-authored-by: Alexis Campailla <alexis@janeasystems.com>
Co-authored-by: Bret Anderson <bretan@microsoft.com>
Co-authored-by: Enrico Giordani <enrico.giordani@gmail.com>
Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>
Co-authored-by: Jeff Bogdan <jeffbog@microsoft.com>
Co-authored-by: March Rogers <marchr@microsoft.com>
Co-authored-by: Mike Harsh <mharsh@microsoft.com>
Co-authored-by: Nachum Bundak <Nachum.Bundak@microsoft.com>
Co-authored-by: Oliver Jones <ojones@microsoft.com>
Co-authored-by: Patrick Little <plittle@microsoft.com>

src/common/common.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <optional>
+#include <Windows.h>
+
+// Returns RECT with positions of the minmize/maximize buttons of the given window.
+// Does not always work, since some apps draw custom toolbars.
+std::optional<RECT> get_button_pos(HWND hwnd);
+// Gets position of given window.
+std::optional<RECT> get_window_pos(HWND hwnd);
+// Gets mouse postion.
+std::optional<POINT> get_mouse_pos();
+// Calculate sizes
+int width(const RECT& rect);
+int height(const RECT& rect);
+// Compare rects
+bool operator<(const RECT& lhs, const RECT& rhs);
+// Moves and/or resizes small_rect to fit inside big_rect.
+RECT keep_rect_inside_rect(const RECT& small_rect, const RECT& big_rect);
+// Initializes and runs windows message loop
+int run_message_loop();
+
+void show_last_error_message(LPCWSTR lpszFunction, DWORD dw);
+
+enum WindowState {
+  UNKNONW,
+  MINIMIZED,
+  MAXIMIZED,
+  SNAPED_TOP_LEFT,
+  SNAPED_LEFT,
+  SNAPED_BOTTOM_LEFT,
+  SNAPED_TOP_RIGHT,
+  SNAPED_RIGHT,
+  SNAPED_BOTTOM_RIGHT,
+  RESTORED
+};
+WindowState get_window_state(HWND hwnd);