Add function to automatically find dirs containing cmake configs

cmake/Utils.cmake

@@ -0,0 +1,10 @@
+function(FindCmakeConfigDirs BASE_DIR OUTPUT_NAME)
+    file(GLOB_RECURSE ALL_CONFIGS "${BASE_DIR}/*[Cc]onfig.cmake")
+    set(PACKAGE_SUB_DIRS "")
+    foreach(CONF ${ALL_CONFIGS})
+        get_filename_component(DIR_NAME "${CONF}" DIRECTORY)
+        list(APPEND PACKAGE_SUB_DIRS "${DIR_NAME}")
+    endforeach()
+    list(REMOVE_DUPLICATES PACKAGE_SUB_DIRS)
+    set(${OUTPUT_NAME} ${PACKAGE_SUB_DIRS} PARENT_SCOPE)
+endfunction()