Add custom config from wireguard

[NoozPrime]

Issue Details

I would like to add a custom config from wireguard as a protection would be cool to allow it

Proposed solution

Adding a custom config will give us a way to hide our ip address even if adguard vpn is available having the possibility of creating our own would be cool

Alternative solution

No response

[ESurina]

We'll see how other users vote. If there are a lot of people who need this function, then we will make it!