Feature/improve localization (#1147)

* use locale to set language header

* rewrite i18n provider and drop dependency

* rename file

* rename CrudMixin to HttpRepo

* refactor: code-cleanup

* add crowdin source

* remove unused translations

* grab translations from dev branch

* add translation support for foods, units, and labels

* remove rich import

pyproject.toml

@@ -35,7 +35,6 @@ recipe-scrapers = "^13.28.0"
 psycopg2-binary = {version = "^2.9.1", optional = true}
 gunicorn = "^20.1.0"
 emails = "^0.6"
-python-i18n = "^0.3.9"
 python-ldap = "^3.3.1"
 pydantic = "^1.9.0"
 tzdata = "^2021.5"