person: add altnames in the person creation modal

src/Bundle/ChillPersonBundle/Resources/public/vuejs/_api/OnTheFly.js

@@ -10,6 +10,13 @@ const getPerson = (id) => {
       });
 };
 
+const getPersonAltNames = () =>
+   fetch('/api/1.0/person/config/alt_names.json').then(response => {
+      if (response.ok) { return response.json(); }
+      throw Error('Error with request resource response');
+   });;
+
+
 /*
 * POST a new person
 */
@@ -48,6 +55,7 @@ const patchPerson = (id, body) => {
 
 export {
    getPerson,
+   getPersonAltNames,
    postPerson,
    patchPerson
 };