Add description to list items & add `ip.network.cidr` to lists

💜 We're always looking to improve your experience.

1. You can now add a description to an item you add to a list so that you can remember important details about what or why you put said item on the list (eg., high risk IP added 12/14/23).
2. You can now add the signal ip.network.cidr to a list making it easier to act on CIDR block ranges in rules!