Merge pull request #25496 from Kumataro:fix25495

highgui: wayland: show "NO" status if dependency is missing #25496

Close #25495

- [doc] Add document to enable Wayland highgui-backend in ubuntu 24.04.
- [build] Show "NO" status instead of version if dependency library is missing.
- [build] Fix to find Wayland EGL.
- [fix] Add some callback stub functions to suppress build warning.

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [ ] I agree to contribute to the project under Apache 2 License.
- [ ] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [ ] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/highgui/cmake/detect_wayland.cmake

@@ -9,7 +9,7 @@ macro(ocv_wayland_generate protocol_file output_file)
     list(APPEND WAYLAND_PROTOCOL_SOURCES ${output_file}.h ${output_file}.c)
 endmacro()
 
-ocv_clear_vars(HAVE_WAYLAND_CLIENT HAVE_WAYLAND_CURSOR HAVE_XKBCOMMON HAVE_WAYLAND_PROTOCOLS)
+ocv_clear_vars(HAVE_WAYLAND_CLIENT HAVE_WAYLAND_CURSOR HAVE_XKBCOMMON HAVE_WAYLAND_PROTOCOLS HAVE_WAYLAND_EGL)
 if(WITH_WAYLAND)
     ocv_check_modules(WAYLAND_CLIENT wayland-client)
     if(WAYLAND_CLIENT_FOUND)
@@ -32,4 +32,10 @@ if(WITH_WAYLAND)
     if(HAVE_WAYLAND_CLIENT AND HAVE_WAYLAND_CURSOR AND HAVE_XKBCOMMON AND HAVE_WAYLAND_PROTOCOLS)
         set(HAVE_WAYLAND TRUE)
     endif()
+
+    # WAYLAND_EGL is option
+    ocv_check_modules(WAYLAND_EGL wayland-egl)
+    if(WAYLAND_EGL_FOUND)
+        set(HAVE_WAYLAND_EGL ON)
+    endif()
 endif()