feat: add overlay for deleting PAYG and Contract orgs (#6379)

* feat: add overlay for deleting PAYG and Contract orgs

* chore: refactor delete org overlay

* chore: resolve nits from code review

* fix: cant exit overlay while deleting an org

* chore: add explicit flag to default org notification, refactor [skip CI]

* chore: change support message, trigger notification based on new org, not redirect from orgslist

* chore: move delete notification into helper function [skip CI]

* chore: refactor to alternative design (notify, then redirect)

* chore: add upper bound, notification for delayed responses

* chore: fix formatting of error notifications

* chore: replace magic numbers with constants

Author: wdoconnell