standardize import command

src/locales/en/messages.json

@@ -13,5 +13,11 @@
   },
   "noneFolder": {
     "message": "No Folder"
+  },
+  "importFormatError": {
+    "message": "Data is not formatted correctly. Please check your import file and try again."
+  },
+  "importNothingError": {
+    "message": "Nothing was imported."
   }
 }