Support to receive discord event by webhook

[linliyuan]

Currently, only the callback gateway events support webhook reception. Why can't other events also be received through webhook? I've seen many other platforms receive through callbacks when accessing APIs, which seems more complete. If there is a retry mechanism, it can ensure that data is not lost. The current use of the websocket access is much more complicated than the callback.

[randomairborne]

The complexity allows for greater efficiency, with no need for HTTP headers, high-latency reconnects, and session pain.