Add basic support for threads

[GeniusTimo]

Hey there 👋

This pull request is quite incomplete, but I wanted to leave this as a suggestion to provide support for sending webhook messages within threads. Perhaps my solution is as simple as suggested but I have not tested this yet - in addition, it lacks any documentation.

Hopefully I'm not the only one looking for a thread-only webhook ✌

[vercel[bot]]

@GeniusTimo is attempting to deploy a commit to the Sentry Discord Team on Vercel.

A member of the Team first needs to authorize it.

[IanMitchell]

Oh interesting. I actually don't know how threads and webhooks work within Discord - is it a webhook on a channel with just the thread_id param passed in?

[GeniusTimo]

Yes! https://discord.dev/resources/webhook#execute-webhook

[IanMitchell]

Sweet! I will try to take a look at this sometime this week, but I might be a little too busy to get to it - I'm heading out on an international trip for a week, so this might sit until the second week of September, sorry :(

[GeniusTimo]

No problem, have a nice vacation ✈