New strings were delivered already today, so let's add them immediately in this PR so we have a little less on our checklist later!
This adds "Persian" to all the languages, and brings the Persian files up-to-date (mainly removing outdated strings and adding some late 2.4 stuff that we'll contact all translators for soon)
A bit overdue since this was delivered a few weeks ago (oops), but here it is! Thanks to Amir Arzani and Masoud Varaste.
