✨(backend) create ai endpoint

We created 2 new action endpoints on the document
to perform AI operations:
- POST /api/v1.0/documents/{uuid}/ai-transform
- POST /api/v1.0/documents/{uuid}/ai-translate

src/backend/core/enums.py

@@ -2,15 +2,11 @@
 Core application enums declaration
 """
 
-from django.conf import global_settings, settings
+from django.conf import global_settings
 from django.utils.translation import gettext_lazy as _
 
-# Django sets `LANGUAGES` by default with all supported languages. We can use it for
-# the choice of languages which should not be limited to the few languages active in
-# the app.
+# In Django's code base, `LANGUAGES` is set by default with all supported languages.
+# We can use it for the choice of languages which should not be limited to the few languages
+# active in the app.
 # pylint: disable=no-member
-ALL_LANGUAGES = getattr(
-    settings,
-    "ALL_LANGUAGES",
-    [(language, _(name)) for language, name in global_settings.LANGUAGES],
-)
+ALL_LANGUAGES = {language: _(name) for language, name in global_settings.LANGUAGES}