Add some ways to work with user_email in remove_project_collaborator() and update_project_collaborator()

[JanCaha]

When using remove_project_collaborator() or update_project_collaborator() one needs user_id which is not exactly easy to get. It can be extracted from list_project_collaborators() which provides the info, but it is not really handy or intuitive.

Either remove_project_collaborator() and update_project_collaborator() should take also user_email besides user_id to allow editing collaborators for project. Or there could be new Endpoint and client function to get user_id from user_email.

[wonder-sk]

+1!

Also, please:

• make it possible to pass project name ("{workspace}/{name}") instead of project ID in add_project_collaborator(), update_project_collaborator(), remove_project_collaborator(), list_project_collaborators()
• make it possible to pass workspace name instead of workspace ID in list_workspace_members(), get_workspace_member(), update_workspace_member(), remove_workspace_member()

That will make example Jupyter notebooks easier to digest: https://github.com/MerginMaps/python-api-client/blob/b39e6bbb08fd006be6e8bed7d9d4884a05f9063a/examples/01_users.ipynb