Moved C++ tools out

tools/assetstool/CMakeLists.txt

@@ -0,0 +1,13 @@
+# Copyright (c) 2023 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+add_custom_target(dawnassets
+  COMMAND ${DAWN_TOOLS_DIR}/assetstool/assetstool.py
+    --input=${DAWN_ASSETS_BUILD_DIR}
+    --output=${DAWN_BUILD_DIR}/assets.tar
+  COMMENT "Bundling assets..."
+    USES_TERMINAL
+    DEPENDS ${DAWN_ASSETS}
+)