[React] UI Translation Updates (#6257)

* Move locales definition into separate file

- Cleanup settings.py a bit

* Update docstring

* Expose 'default_locale' to info API endpoint

* Validate settings.LANGUAGE_CODE

* Fix bug in BuildDetail page

* Use selected language when making API queries

* Translate more strings

* Tweak variable name

* Update locale config

* Remove duplicate code

* Remove compiled messages.ts translation files

* Fixes for LanguageContext.tsx

* Update messages.d.ts for sr locale

* Ensure compiled files are served by django runserver

* Amend changes to STATICFILES_DIRS

* Cleanup prerender.py

* Refetch status codes when locale is changed

* Fix log msg

* Clear out old static files

.gitignore

@@ -105,6 +105,7 @@ InvenTree/plugins/
 
 # Compiled translation files
 *.mo
+messages.ts
 
 # web frontend (static files)
 InvenTree/web/static