Incorporate language tags for variantName of works

[acka47]

Context: This was originally requested by Deutsches Literaturarchiv Marbach via email in June 2022 and then I opened https://jira.dnb.de/browse/GND-211 (login necessary) in the DNB JIRA.

DNB have now added language tags to strings in gndo:variantNameForTheWork. The changes will be provided to lobid with the next dump by the end of October.

Example: https://d-nb.info/gnd/4119779-3

Before:

<https://d-nb.info/gnd/4119779-3>  gndo:variantNameForTheWork "Der letzte Grund", "Sansibar oder Der letzte Grund", "Sang gei ba er Huo zui hou yi ge li you",
    "Sang gei ba er huo Hou yi ge li you", "Drømmen om Zanzibar", "Flight to afar", "Unelma Sansibarista",
    "Zanzibar", "Zanzibar ovvero L'ultimo perché", "Zanzíbar o l'última raó", "Zanzibar",
    "De laatste reden", "Zanzibar aneb Poslední dúvod", "Zanzibar sau Ultima ratiune",
    "Drömmen om Sansibar", "Zanzibar ali poslednji razlog", "Zanzibar aneb poslední důvod",
    "A végsö ok" .

Now:

<https://d-nb.info/gnd/4119779-3> gndo:variantNameForTheWork "Der letzte Grund", "Sansibar oder Der letzte Grund", 
"Sang gei ba er Huo zui hou yi ge li you"@zh,  "Sang gei ba er huo Hou yi ge li you"@zh, 
"Drømmen om Zanzibar"@da, "Flight to afar"@en,     "Unelma Sansibarista"@fi, "Zanzibar"@fr, 
"Zanzibar ovvero L'ultimo perché"@it, "Zanzíbar o l'última raó"@ca, "Zanzibar"@nl, "De laatste reden"@nl, 
"Zanzibar aneb Poslední dúvod"@pl, "Zanzibar sau Ultima ratiune"@ro,"Drömmen om Sansibar"@sv, 
"Zanzibar ali poslednji razlog"@sl, "Zanzibar aneb poslední důvod"@cs, "A végsö ok"@hu .

I am not sure, we can incorporate this information in lobid-gnd without an API break if we adjust the variantName field where we put it. I assume this was just changed for works, so we might add in addition variantNameForTheWork to the context and use language maps with it:

{
   "variantNameForTheWork":{
      "@id":"https://d-nb.info/standards/elementset/gnd#variantNameForTheWork",
      "@container":"@language"
   }
}

[acka47]

Tracy (what's her GitHub handle again?) notes : language tags for variant names of person have already been existing in the GND RDF for quite some time.

Example https://d-nb.info/gnd/1047091410:

<https://d-nb.info/gnd/1047091410> gndo:variantNameForThePerson "中院仲子"@ja;
  gndo:variantNameEntityForThePerson _:node1hceo5khkx61782 .

_:node1hceo5khkx61782 gndo:personalName "中院仲子" .

<https://d-nb.info/gnd/1047091410> gndo:variantNameForThePerson "周芳"@ja;
  gndo:variantNameEntityForThePerson _:node1hceo5khkx61783 .

_:node1hceo5khkx61783 gndo:personalName "周芳" .

We have that covered in the JSON like this (which I must say, does not look very "usable"/LOUD to me):

"variantNameEntityForThePerson": [

        {
              "personalName": [
                    "周芳"
              ]
        },
        {
              "personalName": [
                    "Shūhō"
              ]
        },
        {
              "personalName": [
                    "Nakanoin Nakako"
              ]
        },
        {
              "personalName": [
                    "中院仲子"
              ]
        }

  ],
  "languageCode": [

        {
              "id": "http://id.loc.gov/vocabulary/iso639-2/jpn",
              "label": "http://id.loc.gov/vocabulary/iso639-2/jpn"
        }

  ]