How can a user self-delete?

[riking (Kane York)]

See also:

Allow removing account info without content deletion

It may happen that users decide they don’t want an account on your Discourse, even after posting there for months or years. Problem: if you delete the user, all their content (posts, topics) disappears, leaving holes in conversations and removing other people’s replies to their topics. So what if we offered an anonymize account or remove account button that: sets all their profile information back to default new user state turns off all notifications picks a large random number and changes t…