Allow users to specify a name when they open the client for the first time

[soda-pop-ice-cream]

I was waiting for something like that for long-long time! Basically, i have selfhosted streaming project and this chat embedd on website will look so-so much like twitch. Can't wait to try it out after adding this feature!

[bramenn]

This name request could be used to establish the name of the room.