Create a config entity to manage IPs

Problem/Motivation

A set of IP can be set to a route for restrict it but the same set of Ip can be use for other routes.
Instead of rewrite always the same set of IP it could be useful to reuse them.

Proposed resolution

- Create a config entity to manage a set of IP (or range of IP).
- Create an interface to manage a list of set (create, update, delete)
- Link this config entity to the restrictRoute entity with a select (a select multiple could be interreresting to link many sets to 1 route)