Add web front-end and fix API issues

node_modules/yargs/browser.mjs

@@ -0,0 +1,7 @@
+// Bootstrap yargs for browser:
+import browserPlatformShim from './lib/platform-shims/browser.mjs';
+import {YargsFactory} from './build/lib/yargs-factory.js';
+
+const Yargs = YargsFactory(browserPlatformShim);
+
+export default Yargs;