Change allow ip to ip allow

We want to add support for other HTTP verbs wrt allowed ip which means that we'll want to have a root ip command then:

- ip allow
- ip get
- ip delete/drop

So we need to change the current command.

Start by locating the current `ip` command implementation and any tests covering it. Compare its existing syntax with the requested root `ip` command and `allow`, `get`, and `delete`/`drop` subcommands. Done when the command supports the requested structure and existing behavior remains covered by tests.

Written by the indexing model from the issue text.