feat(web-api): export the chat streamer and related options from the package

[zimeg]

Summary

This PR exports the ChatStreamer and ChatStreamerOptions from @slack/web-api for importing elsewhere with type safety 🎁

Preview

 /**
 * @param {import("@slack/web-api").ChatStreamer} streamer - Slack chat stream
 */

Fixes issues with jsdoc noted in sample app changes: https://github.com/slack-samples/bolt-js-assistant-template/pull/98/files#diff-a45b5e2e63df5007d9680c1776b0381dc48bcad3fbd9d443ac19e6dd077c386aR12 🤖

Notes

I considered adding the "chat-stream" file to known exports for the following result too, but don't feel so confident in this approach:

 /**
 * @param {import("@slack/web-api/chat-stream").ChatStreamer} streamer - Slack chat stream
 */

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.07%. Comparing base (f2ac218) to head (ca27644).
⚠️ Report is 1 commits behind head on feat-ai-apps-thinking-steps.
✅ All tests successful. No failed tests found.

Additional details and impacted files

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##           feat-ai-apps-thinking-steps    #2481   +/-   ##
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  Coverage                        93.07%   93.07%           
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  Files                               40       40           
  Lines                            11213    11213           
  Branches                           708      708           
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  Hits                             10437    10437           
  Misses                             764      764           
  Partials                            12       12           

Flag	Coverage Δ
cli-hooks	95.23% <ø> (ø)
cli-test	94.79% <ø> (ø)
webhook	96.66% <ø> (ø)

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[mwbrooks]

✅ Great find @zimeg! I'm glad our sample app development is exposing these improvements.

💭 I agree with you, this syntax feel more intuitive to me. 🚢

[srtaalej]

AH good catch! Thank you so much!

[zimeg]

@mwbrooks @srtaalej Likewise thanks both quite a lot for being so encouraging to iterations 👾 ✨