Added full favourite button functionality to web page

...main/java/com/example/clientproject/data/shops/Shops.java

...example/clientproject/services/BusinessRegisterSaver.java

...example/clientproject/web/controllers/HomeController.java

src/main/resources/static/js/favouriteBusiness.js

src/main/resources/templates/fragments/reward_card.html

src/main/resources/templates/index.html

...java/com/example/clientproject/data/shops/ShopsTests.java

...entproject/data/userPermissions/UserPermissionsTests.java