Add fnr validation component

frontend/public/locales/en/common.json

@@ -7,5 +7,12 @@
     "change": "Change language to {{lang}}"
   },
   "fnr": "National identity number",
-  "loading": "Loading..."
+  "header": {
+    "applicationTitleShort": "GREG",
+    "applicationTitleLong": "Guest Registration",
+    "selectLanguage": "Select language"
+  },
+  "loading": "Loading...",
+  "termsHeader": "Terms",
+  "staging": "Staging"
 }