resolve issue with missing vite-plugin-node-polyfills

add LibreJS licenses to all demo JS
split browser build from node build
add copyright info to license files
update to use yarn v4.13.0
update to v0.9.2

public/demo/external-links.js

@@ -1,3 +1,5 @@
+// @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt
+
 document.addEventListener("DOMContentLoaded", () => {
 	const currentHost = window.location.hostname;
 
@@ -10,3 +12,5 @@ document.addEventListener("DOMContentLoaded", () => {
 		}
 	});
 });
+
+// @license-end