v5.48.1 API docs and user deletion relocate

API

• Performance: Use worker server instead of main for user deletion operations (@phillipthelen and @SabreCat)
• Chore: Locale files updated (@weblate contributors)

Client

• Feature: Add sitemap and robots.txt (@phillipthelen)
• Refactor: Move apidoc to its own site, domain, and repo (@SabreCat)