WTH Wireguard client

There is a Wireguard add-on which allows only to be used as a server not as a client to another Wireguard server. As Wireguard is now in kernel, let’s make it available in Home Assistant OS to allow access when no input ports are allowed by the ISP.

Please take a look at the rules for Month of “What the heck?!”. Any request for a new integration/addon is meant for feature requests and does not fall into the WTH category.