[IDEA] Allow plugin.info to have translations

[linonetwo]

Is your feature request related to a problem? Please describe.

translate plugin name and description when they are not installed yet

Discussed on feat: t macro and docs #7821 (comment)

Describe the solution you'd like

plugin.info is a JSON (I'm not sure what it become after install, but should be a JSON tiddler too?), so instead of use field like name::fr-FR, we should use

{
  name: 'default name',
  languages: {
    zh-Hans: '中文名',
    fr-FR: 'xxx',
  }
}

Describe alternatives you've considered

I'm afraid flatten field like name::fr-FR will make a long list and difficult to maintain.

Additional context

Make everything fully international.

[Jermolene]

Hi @linonetwo the contents of plugin.info is flattened into tiddler fields as plugins are loaded, which implies that the language processing would have to be done as the plugin was constructed under Node.js. So, I think it would be more useful if the available translations were all retained so that the single file configuration of TiddlyWiki could also choose the best language to use.