Starting to support OSX

cmake/targets/target-liminal-osx-glfw/CMakeLists.txt

@@ -0,0 +1,10 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+set(DAWN_BUILDING dawnliminal CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_TARGET_OSX true CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_TARGET_GLFW true CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_TARGET_NAME "Liminal" CACHE INTERNAL ${DAWN_CACHE_TARGET})
+set(DAWN_VISUAL_NOVEL true CACHE INTERNAL ${DAWN_CACHE_TARGET})