remove IG sync tool, add pre-commit hooks

.pre-commit-config.yaml

Dockerfile

Makefile

asset_server_resize/apps.py

asset_server_resize/views.py

env.example

mail_signature/apps.py

mail_signature/templates/mail_signature/index.html

mail_signature/views.py

manage.py

member_group_size_calc/views.py

requirements/production.txt

rv_voting_calc/templates/rv_voting_calc/index.html

rv_voting_calc/templatetags/index.py

rv_voting_calc/urls.py

rv_voting_calc/views.py

rybicka/asgi.py

rybicka/settings/base.py

rybicka/settings/dev.py

rybicka/urls.py