Merge pull request #23596 from vrabaud:libavif

Add AVIF support through libavif. #23596

This is to fix https://github.com/opencv/opencv/issues/19271
Extra: https://github.com/opencv/opencv_extra/pull/1069

### Pull Request Readiness Checklist

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

- [x] I agree to contribute to the project under Apache 2 License.
- [x] 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
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

cmake/OpenCVFindAVIF.cmake

@@ -0,0 +1,46 @@
+#=============================================================================
+# Find AVIF library
+#=============================================================================
+# Find the native AVIF headers and libraries.
+#
+#  AVIF_INCLUDE_DIRS - where to find avif/avif.h, etc.
+#  AVIF_LIBRARIES    - List of libraries when using AVIF.
+#  AVIF_FOUND        - True if AVIF is found.
+#=============================================================================
+
+# Look for the header file.
+
+unset(AVIF_FOUND)
+
+find_package(libavif QUIET)
+
+if(TARGET avif)
+    MARK_AS_ADVANCED(AVIF_INCLUDE_DIR)
+    MARK_AS_ADVANCED(AVIF_LIBRARY)
+
+    SET(AVIF_FOUND TRUE)
+    GET_TARGET_PROPERTY(AVIF_LIBRARY avif LOCATION)
+    GET_TARGET_PROPERTY(AVIF_INCLUDE_DIR1 avif INCLUDE_DIRECTORIES)
+    GET_TARGET_PROPERTY(AVIF_INCLUDE_DIR2 avif INTERFACE_INCLUDE_DIRECTORIES)
+    set(AVIF_INCLUDE_DIR)
+    if(AVIF_INCLUDE_DIR1)
+        LIST(APPEND AVIF_INCLUDE_DIR ${AVIF_INCLUDE_DIR1})
+    endif()
+    if(AVIF_INCLUDE_DIR2)
+        LIST(APPEND AVIF_INCLUDE_DIR ${AVIF_INCLUDE_DIR2})
+    endif()
+else()
+    FIND_PATH(AVIF_INCLUDE_DIR NAMES avif/avif.h)
+
+     # Look for the library.
+    FIND_LIBRARY(AVIF_LIBRARY NAMES avif)
+    MARK_AS_ADVANCED(AVIF_LIBRARY)
+
+    # handle the QUIETLY and REQUIRED arguments and set AVIF_FOUND to TRUE if
+    # all listed variables are TRUE
+    INCLUDE(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
+    FIND_PACKAGE_HANDLE_STANDARD_ARGS(AVIF DEFAULT_MSG AVIF_LIBRARY AVIF_INCLUDE_DIR)
+
+    SET(AVIF_LIBRARIES ${AVIF_LIBRARY})
+    SET(AVIF_INCLUDE_DIRS ${AVIF_INCLUDE_DIR})
+endif()