fix: validation on profile page (#398)

* fix validation of username and fullname

* fix

* fix message

* Update validator.js

* Update Profile.svelte

* remove unused functions

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/dashboard/src/lib/utils/translations/en.json

@@ -1329,7 +1329,9 @@
 
   "validations": {
     "user_profile": {
-      "email": "Invalid email address"
+      "email": "Invalid email address",
+      "username":"Username cannot be empty",
+      "fullname":"Name should be minimum of 5 characters"
     },
     "organization_name": {
       "min_char": "Organization must contain 5 or more characters",