feat(employee-list): Added search functionality using API. (TV-221)

Squashed commit of the following:

commit 4b93fcf4b8442a30c8d56cf8364f710b2d24c4e2
Author: Erik Tiekstra <erik.tiekstra@arbetsformedlingen.se>
Date:   Mon Jun 14 15:50:17 2021 +0200

    Added fullName inside mock-api and filtering using api

mock-api/dafa-web/scripts/employees.js

@@ -28,6 +28,7 @@ function generateEmployees(amount = 10) {
       createdAt: Date.now(),
     };
 
+    person.fullName = `${person.firstName} ${person.lastName}`;
     employees.push(person);
   }