Add options to manually add and remove friends as well as see current friends.

[NanoAi]

I've noticed that we don't have options to manually add and remove friends on the server.

For those times when you want to be friends with some one but don't want them on your Steam friends list, or for when you don't want to be friends with some one on the server but would like to stay friends on Steam.

Also it would be nice to know when a friend joins, and to see how many friends you have on the server currently.

[Earu]

I guess i could make it so join/leave messages show only for friends

[CapsAdmin]

As for joining we will need a list of steamids that are a players friend somehow. Maybe http.Fetch steam friends on startup for each client or something.

[Earu]

steamapi @CapsAdmin
but show joining and leaving only for friends or only joining?
https://github.com/Re-Dream/addons/blob/master/lua_helpers/lua/lua_helpers/steamapi.lua (for reference)