Adding built in extensions + example

web/index.html

@@ -6,6 +6,8 @@
 		<script type="text/javascript" src="lib/litegraph.core.js"></script>
 
 		<script type="module">
+			import "/extensions/core/dynamicPrompts.js";
+
 			import { app } from "/scripts/app.js";
 			await app.setup();
 			window.app = app;