Add more informations in reference transaction

[Neylix]

Is your feature request related to a problem?

To update the website we need to have the file hash to compare it to the new uploaded files.
We may have the size of the files to display it in the listing directory
For regression we also need to have a version number.

Describe the solution you'd like

For the version we can add a version number on top of the JSON like

{
  "aeweb_version" : 1,
  "folder": ...
}

For the size and the hash we can have something like this

{
  "file.txt": {
    "encoding": "gzip",
    "addresses": [...],
    "hash": "123456789abcdef",
    "size": 12 // in kb
  }
}

Additional context

No response