change private ip subnet on client side when setup

[Massaro522]

Is your feature request related to a problem? Please describe.
It is not an issue at the moment. The only issue will appear when you're using one client (f.e. UDM Pro) which is connecting to two wg endpoints with the same default ip subnet (10.8.0.2/24) then it wouldn't be able to route traffic to 10.8.0.2/24 twice.

Describe the solution you'd like
Add a value or possibility to change the default ip range of the wg clients ip on setup.

Thanks :)