Custom rewriteKeys when adding adding new keys to json file

[mscolnick]

Is your feature related to a specific framework or general for this extension
Custom framework

Describe the solution you'd like
It would be great to have custom rewriteKeys. Currently when adding a new key foo.bar, it'll add it like so:

{
 ...
 "foo.bar": "{count} car"
}

It would be nice to have the option to write this to:

{
 ...
 "foo.bar": {
     "singular": "{count} car",
     "plural": "",
     "description": "",
  }
}

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.