[i18n] ICU plural format - support # and offset #9117
Description
We currently do not support offset nor #
ICU:
"{num_guests, plural, offset:1 "
"=0 {{host} does not give a party.}"
"=1 {{host} invites {guest} to her party.}"
"=2 {{host} invites {guest} and one other person to her party.}"
"other {{host} invites {guest} and # other people to her party.}}}"
While this is not strictly required because we can use angular expression, it would be nicer for translators.
For # we need:
- to be able to use escaping, /ref [i18n] escaping in ICU message #9286
- localize the number I18nPluralPipe should localize numbers when using # #11761