add new toolgroup

wax-prosemirror-services/src/WaxToolGroups/DisplayTextToolGroupService/DisplayText.js

+import React from 'react';
+import { injectable, inject } from 'inversify';
+import { LeftMenuTitle } from 'wax-prosemirror-components';
+import ToolGroup from '../../lib/ToolGroup';
+
+@injectable()
+class DisplayText extends ToolGroup {
+  tools = [];
+  toolGroups = [];
+
+  constructor(@inject('Display') display, @inject('Text') text) {
+    super();
+    this.toolGroups = [display, text];
+  }
+
+  renderTools(view) {
+    return <span>hi</span>;
+  }
+}
+
+export default DisplayText;

wax-prosemirror-services/src/WaxToolGroups/DisplayTextToolGroupService/DisplayTextToolGroupService.js

+import Service from '../../Service';
+import DisplayText from './DisplayText';
+
+class DisplayTextToolGroupService extends Service {
+  register() {
+    this.container.bind('DisplayText').to(DisplayText);
+  }
+}
+
+export default DisplayTextToolGroupService;