ajout style listingController

src/assets/style/displayController.css

+div.controller {
+  margin : 10px;
+  padding : 10px;
+  border : solid thin #AAA;
+}
+
+div.controller button {
+  margin : 0px 10px;
+}

src/components/personListingController.component.jsx

 import { useState } from 'react';
 
 import PersonListing from './personListing.component.jsx';
+import '../assets/style/displayController.css';
 
 const PersonListingController = ({ initialDelay = 250 }) => {