migrate iPPI-DB to Django 4.0

• fix a few problems due to Django upgrades
  • using an expression to sort a list view: F('-tanimoto')->F('-tanimoto')
  • all calls to translation calls ugettext*** replaced with gettext**
  • moved admin site config to a separate module
• forgotten migration added
• dev environment now uses docker-compose
• delete ansible deployment code now obsolete

ansible/README.md

-# iPPI-DB ansible playbooks
-
-This repository contains the playbooks to manage an ippidb instance with ansible
-
-- `system.yaml`: install system requirements
-- `deploy.yaml`: download/update iPPI-DB and perform required procedures to migrate and restart
-
-## how to use these ?
-
-```
-ansible-playbook -v -i ./hosts_system system.yaml --ask-become-pass --extra-vars "deploy_user_name=ippidb repo_api_token=JZS-4cH7bWkFkHa2rAVf"
-ansible-playbook -v -i ./hosts_deploy deploy.yaml --ask-become-pass --extra-vars "deploy_user_name=ippidb repo_api_token=JZS-4cH7bWkFkHa2rAVf"
-```