Added new file to find the OpenXR package

FindOpenXR.cmake

@@ -0,0 +1,48 @@
+#[=======================================================================[.rst:
+FindOpenXR
+----------
+
+A library to import and export various 3d-model-formats including
+scene-post-processing to generate missing render data.
+
+http://OpenXR.org/
+
+IMPORTED Targets
+^^^^^^^^^^^^^^^^
+
+This module defines :prop_tgt:`IMPORTED` target ``OpenXR::OpenXR``, if
+yaml-cpp has been found.
+
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This module defines the following variables::
+
+  OpenXR_FOUND          - "True" if yaml-cpp was found
+  OpenXR_INCLUDE_DIRS   - include directories for yaml-cpp
+  OpenXR_LIBRARIES      - link against this library to use yaml-cpp
+
+The module will also define three cache variables::
+
+  OpenXR_INCLUDE_DIR        - the yaml-cpp include directory
+  OpenXR_LIBRARY            - the path to the yaml-cpp library
+
+#]=======================================================================]
+
+find_path(OpenXR_INCLUDE_DIR NAMES openxr/openxr.h)
+find_library(OpenXR_LIBRARY NAMES openxr_loader Debug/openxr_loader)
+
+set(OpenXR_INCLUDE_DIRS ${OpenXR_INCLUDE_DIR})
+set(OpenXR_LIBRARIES ${OpenXR_LIBRARY})
+
+find_package_handle_standard_args(OpenXR DEFAULT_MSG OpenXR_INCLUDE_DIR OpenXR_LIBRARY)
+
+mark_as_advanced(OpenXR_INCLUDE_DIR OpenXR_LIBRARY)
+
+if(OpenXR_FOUND AND NOT TARGET OpenXR::OpenXR)
+    add_library(OpenXR::OpenXR UNKNOWN IMPORTED)
+    set_target_properties(
+        OpenXR::OpenXR PROPERTIES IMPORTED_LOCATION "${OpenXR_LIBRARIES}"
+                        INTERFACE_INCLUDE_DIRECTORIES "${OpenXR_INCLUDE_DIRS}")
+endif()