Consider adding ability to archive rather than delete people who have left

[rubenarakelyan]

At the moment, when someone leaves the organisation, the only option is to delete them completely from the directory. I'm not sure whether this was a decision based on removing personal information, or whether it's following the usual CRUD pattern, but it means the organisation loses the history of who has worked there before.

This becomes more useful if you're trying to find out about something authored by someone who's left. By knowing which team they were in, it makes it easier to get in contact with someone currently there who knows about it.

Would it be a good idea to add the ability to archive people when they leave? Perhaps it would remove most of their information apart from their name and their team affiliation. I'm happy to code this up in a PR if it sounds useful.

[jsugarman]

@jeremykatzmoj interesting issue/request on github for PF