Trac ticket number

ticket-36609

Branch description

This PR adds Haitian Creole (ht) as a supported language in Django.
The translation work was completed on Transifex and this patch introduces the following files:

django/conf/locale/ht/LC_MESSAGES/django.po

django/conf/locale/ht/LC_MESSAGES/djangojs.po

django/conf/locale/ht/formats.py

These files enable proper internationalization and formatting support for Haitian Creole.
Adding this language will benefit Haitian developers and users by making Django more accessible in their native language.

Checklist

• This PR targets the main branch.
• The commit message is written in past tense, mentions the ticket number, and ends with a period.
• I have checked the "Has patch" ticket flag in the Trac system.
• I have added or updated relevant tests.
• I have added or updated relevant docs, including release notes if applicable.
• I have attached screenshots in both light and dark modes for any UI changes.