add Instagram sync tool

env.example

instagram_token/__init__.py

instagram_token/admin.py

instagram_token/apps.py

instagram_token/migrations/__init__.py

instagram_token/models.py

instagram_token/templates/instagram_token/exchange.html

instagram_token/templates/instagram_token/index.html

instagram_token/tests.py

instagram_token/urls.py

instagram_token/views.py

rybicka/settings/base.py

rybicka/urls.py

shared/static/shared/instagram.webp

shared/templates/shared/index.html