fix: add firstName and lastName to user model (#473)

* fix: add firstname and lastanme to user model

* fix: avoid undefined in displayName resolve field

* fix: user firstName and lastName instead of firstname lastname

* fix: person table proper naming firstName lastName

* fix: migrate front with firstName and lastName

* fix: make front-graphql-generate not working

front/src/pages/people/people-sorts.tsx

@@ -20,10 +20,10 @@ export const availableSorts = [
     _type: 'custom_sort',
     orderByTemplates: [
       (order: Order_By) => ({
-        firstname: order,
+        firstName: order,
       }),
       (order: Order_By) => ({
-        lastname: order,
+        lastName: order,
       }),
     ],
   },