Add critical project building instructions

README.md

@@ -1,2 +1,5 @@
 # rpgpt
 RPG GPT. Short experience
+
+# Important Building Steps
+Open `art.blend`, go to the scripting tab and hit the play button to export all the 3d assets. Then, make sure that when you build, you also build and run the codegen so that said assets and other files are cpoied and imported