feat: add ai-enabled features text streaming methods, feedback blocks, and loading state

[zimeg]

Release Notes

🍿 https://github.com/slackapi/python-slack-sdk/releases/tag/v3.37.0

Summary

This PR adds features related to AI apps:

• Chat Text Stream: The chat.startStream, chat.appendStream, chat.stopStream API methods alongside a .chat_stream() helper.
• Blocks: The context_actions block and feedback_blocks and icon_button block elements.
• Loading State: The assistant.threads.setStatus method accepts loading messages.

Testing

In CI and prior PRs! 🎁 ✨

Category

• slack_sdk.web.WebClient (sync/async) (Web API client)
• slack_sdk.models (UI component builders)
• /docs (Documents)
• tests/integration_tests (Automated tests for this library)

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.
• I've run python3 -m venv .venv && source .venv/bin/activate && ./scripts/run_validation.sh after making the changes.

[mwbrooks]

✅ Looks good to me! Exciting to see these features land into main! 🎉 Congrats @zimeg@srtaalej! 👏🏻

[codecov]

Codecov Report

❌ Patch coverage is 99.60784% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.11%. Comparing base (82aad20) to head (55a943e).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
slack_sdk/models/blocks/basic_components.py	97.22%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #1766 +/- ##
==========================================
+ Coverage 84.93% 85.11% +0.18% 
==========================================
Files 113 115 +2 Lines 12905 13068 +163 ==========================================
+ Hits 10961 11123 +162 - Misses 1944 1945 +1 

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[zimeg]

@mwbrooks Thanks so much! I am excited to merge this now 🚢 💨