Add Hawaiian as a choice in core language selectors

I'm still a novice in the language, but I'm making some progress. Steps 1 and 2 are now done. I've started translating the installer, welcome page, and a very modest beginning on some of the sections of /admin. ;) There's a local tech meetup in a few weeks, and I'm going to be reaching out both to them and some of the wonderful folks at the University of Hawai'i in Hilo to see if I can find anyone else who wants to help with all this.

I don't know what the criteria are for the core language picker, other than the existence of a translation at l.d.o. Since that now exists and is starting to provide real translations of core, figured it was time to un-postpone this and try to get it into core itself.

Thanks!
-Derek

p.s. If you apply the changes from the MR, and use the installer, don't be confused with "hey, why isn't there a 'Hawaiian' choice?" The installer's language picker uses the translated name of the language, in the native alphabet, etc. Hawaiian is known as "ʻŌlelo Hawaiʻi", and since it starts with ʻ it gets sorted differently. 😅 See the after screenshots for details...

Not sure what needs to be done to get translations up so they get pulled in automatically. But adding to the list seems like it should be perfectly fine.

A few more notes:

1. I wrote a handbook page about my experience trying to add Hawaiian to core: https://www.drupal.org/docs/multilingual-guide/adding-a-language-to-drup... →
2. I asked about this in Slack, and although Gabor didn't provide any additional criteria, he pointed me to #568986: Dynamically update standard language list from localization server → . Marking that related.
3. He did ask about the current diff between core's language selector and the teams on l.d.o. Attached here.

Well done getting the translation started.

Committed f8ac826 and pushed to 10.1.x. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.