add localized to graphql

[soerenmeier]

When building a language navigation it is important to know in which other languages the entry is available. To do this we use

query ($uri: [String], $siteId: [QueryArgument]) {
  entry(uri: $uri, siteId: $siteId) {
    localized {
      language
      url
    }
}

It would be useful to have the same localized property for products.
A workaround is to to do two separate queries:

  product(uri: $uri, siteId: $siteId) {
    ... productFields
  }
  productLocalized: product(uri: $uri, siteId: '*') {
    language
    url
  }

Edit:
On second though, i don't think this workaround works. I think a second query is needed after the id was received. Which increases pageload times.