[Request] Thread Discord support

[Rushaway]

Is your feature request related to a problem? Please describe.
Discord now have thread feature. It will be nice if we can have the choice of use thread or classic channel.

Describe the solution you'd like
Add support for reply to a thread_id

Describe alternatives you've considered
N/A

Additional context
https://discord.com/developers/docs/resources/webhook#execute-webhook

[rumblefrog]

What's the use case to reply to a thread? It doesn't seem ergonomic for users to click on a thread to send messages.

[Rushaway]

You store everything into one forums instead.

[rumblefrog]

Huh, interesting. Definitely the first time I seen a long thread usage.