Added KeyCreateEvent for API usage - fires when creating a key.

Please accept this pull request, I would love to let my plugin "Soulbound" hook into LoreLocks. This would allow automatic soulbinding of keys.

https://github.com/TfT-02/Soulbound/commit/6b8fc62d74b4fde316e4217a8a38f6898b6b2fb3