feat: Translate frontend/src/i18n/en.json in hr

85% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'hr'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

frontend/src/i18n/hr.json

@@ -243,10 +243,10 @@
     "userManagement": "Upravljanje Korisnicima",
     "userUpdated": "Korisnik ažuriran!",
     "username": "Korisničko ime",
-    "users": "Users"
+    "users": "Korisnici"
   },
   "sidebar": {
-    "help": "Help",
+    "help": "Pomoć",
     "hugoNew": "Hugo New",
     "login": "Login",
     "logout": "Logout",