Need to associate dir with each translation

[aphillips]

(general)
https://github.com/WICG/manifest-incubations/blob/gh-pages/translations-explainer.md

The translations block allows the dir value to be overridden for a given locale, but that's probably not a good idea. Instead there should be a way to associate a different base paragraph direction with each localized string (or at least with each language block). If some strings remain unlocalized, the original dir should apply to those strings--not a supplied value associated with translated values.

[loubrett]

This is solved in the latest proposal (w3c/manifest#1045). Eg:

{
"short_name": "dog",
"localized_short_names": [
  {"value": "perro", "lang": "es", "dir": "ltr"},
  {"value": "כֶּלֶב", "lang": "he", "dir": "rtl"}
]
}