Client Groups and Settings

### Problem Description

I would like to group clients together and set rules for the client group and not have to do it for each client. For example, I want to set different rule for my devices, for my wife's devices, for my kids devices, and had the default rules apply to all other devices. I know I can do this by setting it on each client, but that is a lot to manage, when I want to set the same rules for all clients in a group.

### Proposed Solution

Allow for creating custom groups of clients, and apply custom settings to the group as a whole. Ideally this would be very similar to the settings on the Client Config screen.