Add ability to create thread handles

[danthegoodman1]

Problem Statement

Right now there is no way to construct a Thread handle out of bounds (for example, adding a new message to a thread).

https://www.chat-sdk.dev/docs/adapters/slack#using-the-adapter-outside-webhooks shows:

But that doesn't exist:

Proposed Solution

Some constructor for a Thread based on the .threadId of a posted message

Alternatives Considered

No response

Use Case

Priority

None

Contribution

• I am willing to help implement this feature

Additional Context

No response

[remorses]

I would love to have ability to

• create threads
• be notified of thread replies