Feature Request: Making Surrender button useful

[Discontinuum]

Describe the desired feature

So, right now Surrender button does nothing, just types "player surrendered" in the chat and makes him an observer. Other than that, it doesn't help to tell the game outcome. Although for different gamemodes resignation probably leads to different things, and in some modes like coops doing nothing when a player resigns is okay.

So my proposal is: make a new event type, "surrender", which is triggered when one of sides surrenders. Then, scenarios that have meaningful logic of surrendering will use it (like, in usual 1v1 it may be just deleting the leader of a surrendered side, so the other side won), scenarios that don't care about surrenders just don't use it and the ignoring behaviour is the same as it is now.