feat: standardize make extract_translations (#232)

* Create translation directory conf/locale. This is the default used one in openedx-translations
* Remove locale directory. It's not actually used. It was added when completion is stripped out of edx-platform, there is no local translation, and there is no translation project named completion in transifex
* Update make extract_translations to use django-admin instead of manage.py

Refs: FC-0012 OEP-58

.gitignore

@@ -33,6 +33,7 @@ htmlcov/
 
 # Translations
 *.mo
+completion/conf/locale/*/LC_MESSAGES/*
 
 # IDEs and text editors
 *~

Makefile

@@ -86,11 +86,11 @@ selfcheck: ## check that the Makefile is well-formed
 
 extract_translations: ## extract strings to be translated, outputting .mo files
 	rm -rf docs/_build
-	cd completion && ../manage.py makemessages -l en -v1 -d django
-	cd completion && ../manage.py makemessages -l en -v1 -d djangojs
+	cd completion && django-admin makemessages -l en -v1 -d django
+	cd completion && django-admin makemessages -l en -v1 -d djangojs
 
 compile_translations: ## compile translation files, outputting .po files for each supported language
-	cd completion && ../manage.py compilemessages
+	cd completion && django-admin compilemessages
 
 detect_changed_source_translations:
 	cd completion && i18n_tool changed

completion/conf/locale/config.yaml

@@ -0,0 +1,4 @@
+# Configuration for i18n workflow.
+
+locales:
+    - en  # English - Source Language