add login/sign-up page with dark/light mode

node_modules/es-abstract/2018/CreateIterResultObject.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+// https://262.ecma-international.org/6.0/#sec-createiterresultobject
+
+module.exports = function CreateIterResultObject(value, done) {
+	if (typeof done !== 'boolean') {
+		throw new $TypeError('Assertion failed: Type(done) is not Boolean');
+	}
+	return {
+		value: value,
+		done: done
+	};
+};