Remove plone prefix from @site endpoint

[robgietema]

The https://demo.plone.org/++api++/@site returns the following data:

{
  "@id": "https://demo.plone.org/@site", 
  "features": {
    "filter_aliases_by_date": true, 
    "multilingual": false
  }, 
  "plone.allowed_sizes": [
    "icon 32:32", 
    "tile 64:64", 
    "thumb 128:128", 
    "mini 200:65536", 
    "preview 400:65536", 
    "teaser 600:65536", 
    "large 800:65536", 
    "larger 1000:65536", 
    "great 1200:65536", 
    "huge 1600:65536"
  ], 
  "plone.available_languages": [
    "en"
  ], 
  "plone.default_language": "en", 
  "plone.portal_timezone": "UTC", 
  "plone.robots_txt": "Sitemap: {portal_url}/sitemap-index.xml\n\n# Define access-restrictions for robots/spiders\n# http://www.robotstxt.org/wc/norobots.html\n\nUser-agent: *\nDisallow: /search\nDisallow: /login\n\n# Add Googlebot-specific syntax extension to exclude forms\n# that are repeated for each piece of content in the site\n# the wildcard is only supported by Googlebot\n# http://www.google.com/support/webmasters/bin/answer.py?answer=40367&ctx=sibling\n\nUser-Agent: Googlebot\nDisallow: /*login\nDisallow: /*search\nDisallow: /*edit\n", 
  "plone.site_logo": null, 
  "plone.site_title": "Plone 6 Demo Site"
}

The plone. prefix is not needed and is an implementation detail.

[davisagli]

We can't remove it from the REST API unless Volto is updated to look for site settings without this prefix.

[erral]

When we introduced these settings we decided to use the same name as they currently have in the Plone registry. See: #1465 (comment)

[davisagli]

@erral I can see where @robgietema is coming from, since Nick doesn't have a Plone registry.

[erral]

Yes, I do too, just pointing where the decision came from :)