WIP: src-cli users clean

Created by: DaedalusG

Plan

This is a project to bring a python utility script users_clean.py into the main project under src. Currently the CE team often provides this utility script to customers as a bandaid for cleaning up users for license seat reasons.

The script to be emulated: https://github.com/sourcegraph/customer-assets/blob/main/ce-tools/pysdk/cleanup_users.py Thanks @mike-r-mclaughlin !

Tracked issues

Working branch: https://github.com/sourcegraph/src-cli/tree/users-clean

• 👩 Customer issue Users need to be able to remove users in a single command based on usage, this will help to maintain seats for an accurate number of users

• 🙆 Stretch goal

• specify hard removal and soft removal

• send emails to removed users