convert es-button to a glimmer component

Author: mansona

addon/components/es-button.js

@@ -1,20 +1,22 @@
-import Component from 'sparkles-component';
+import Component from '@glimmer/component';
 
-export default class EsButton extends Component {
+export default class EsButtonComponent extends Component {
+  // default value
+  _onClicked = () => {};
 
-  constructor({ onClicked }) {
+  constructor() {
     super(...arguments);
 
-    if(!onClicked) {
+
+    if(!this.args.onClicked) {
       // eslint-disable-next-line no-console
       console.warn(new Error('Button created with no onClicked'));
-      this.onClicked = function() {};
     } else {
-      this.onClicked = onClicked;
+      this._onClicked = this.args.onClicked;
     }
   }
 
   buttonClicked() {
-    this.onClicked();
+    this._onClicked();
   }
 }