Add PlayerSetNickname event

[KarlOfDuty]

• Player player
• string oldName

[zabszk]

I'm not sure if that event is needed.

First of all nickname can only be set once. It's not possible to change the nickname of the player during the round. And even if someone forces the server to do so, the change will be rejected by all the clients anyway. So there is no need for oldName parameter, because it would be always null.

Furthermore in Online Mode nickname is always set almost directly before calling PlayerJoined event.

So that event would only make sense in Offline Mode, am I right?

[KarlOfDuty]

I guess, the one who requested it only runs offline servers iirc.

[zabszk]

I guess, the one who requested it only runs offline servers iirc.

Currently offline mode is quite broken and that still makes the oldName redundant. Generally after 12.0.0 release we will do auth system rework, it will fix offline mode, rework the permissions system (it will be easily usable by plugins then), badges system, etc... after that rework PlayerJoined will be called after nickname is set in offline mode as well.

For now we may add such event, however it will get deprecated really soon.

[KarlOfDuty]

Merged into #57