Declare a section in the isort config listing the Ansible-land dependencies

[webknjaz]

It'd be nice to have a section declared in the isort config that would list the Ansible-land dependencies. As in things from our ecosystem/colleagues. Separately from the rest of the third-party libraries.

Likely depends on: #784
Related: #785

Originally posted by @webknjaz in #777 (comment)

[cidrblock]

unassigned self as I do not see a pressing requirement for this to happen until needed, assigning @webknjaz to close or remediate