Option in the metadata object to make the story.json file user-accessible on the server

Example for the metadata object:
```json
{
"metadata": {
"title": "My Story",
"author": "John Doe",
"storyVersion": "1.0"
"provideJson": true
}
}
```
I'm sure there could be a use case for this

No files or tests are named. Start by locating where the metadata object is parsed and where story.json is served; trace how access is currently handled. Done means the provideJson option has a defined effect on story.json accessibility and its behavior is covered by the project's available verification steps.

Written by the indexing model from the issue text.