Add frontend validation for register page

public/js/register.js

+$(document).ready(function () {
+    $.validate({
+        lang: 'ro',
+        form: '#registerForm',
+        scrollToTopOnError: true,
+        modules: 'html5',
+        modules: 'sanitize',
+        modules: 'security',
+        modules: 'sepa',
+        onError: function ($form) {
+            return false;
+        },
+        onSuccess: function ($form) {
+            return true
+        }
+    });
+});
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