highgui Wayland xdg_shell

-enable using -DWITH_WAYLAND=ON
-adapted from https://github.com/pfpacket/opencv-wayland
-using xdg_shell stable protocol
-overrides HAVE_QT if HAVE_WAYLAND and WITH_WAYLAND are set

Signed-off-by: Joel Winarske <joel.winarske@gmail.com>

Co-authored-by: Ryo Munakata <afpacket@gmail.com>

modules/highgui/src/window.cpp

@@ -613,6 +613,8 @@ void cv::setWindowTitle(const String& winname, const String& title)
     return setWindowTitle_QT(winname, title);
 #elif defined (HAVE_COCOA)
     return setWindowTitle_COCOA(winname, title);
+#elif defined (HAVE_WAYLAND)
+    return setWindowTitle_WAYLAND(winname, title);
 #else
     CV_Error(Error::StsNotImplemented, "The function is not implemented. "
         "Rebuild the library with Windows, GTK+ 2.x or Cocoa support. "
@@ -1226,6 +1228,7 @@ int cv::createButton(const String&, ButtonCallback, void*, int , bool )
 #elif defined (HAVE_GTK)      // see window_gtk.cpp
 #elif defined (HAVE_COCOA)    // see window_cocoa.mm
 #elif defined (HAVE_QT)       // see window_QT.cpp
+#elif defined (HAVE_WAYLAND)  // see window_wayland.cpp
 #elif defined (WINRT) && !defined (WINRT_8_0) // see window_winrt.cpp
 
 #else