refactor: rename AttachingAgentKwargs middleware to AttachingConversationKwargs

[WilliamBergamin]

Summary

This PR aims to move away from the "agent" terminology by renaming the AttachingAgentKwargs middleware to AttachingConversationKwargs

Please feel free to share any other naming ideas 🤔

Testing

CI tests should be sufficient

Category

• slack_bolt.App and/or its core components
• slack_bolt.async_app.AsyncApp and/or its core components
• Adapters in slack_bolt.adapter
• Document pages under /docs
• Others

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

• 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 ./scripts/install_all_and_run_tests.sh after making the changes.

[zimeg]

@WilliamBergamin LGTM and thanks for discussion prior to these changes 🤓

I'm approving quick with a question of eventual changes - would the say argument find eventual place in these kwargs? I understand this can be a breaking change but I am curious now:

bolt-python/slack_bolt/kwargs_injection/args.py

Line 165 in 39007db

self.say: Say=say

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.32%. Comparing base (8908885) to head (39007db).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@ Coverage Diff @@## main #1473 +/- ##
=======================================
Coverage 91.32% 91.32% =======================================
Files 229 229 Lines 7270 7270 =======================================
Hits 6639 6639 Misses 631 631 

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[WilliamBergamin]

I'm approving quick with a question of eventual changes - would the say argument find eventual place in these kwargs? I understand this can be a breaking change but I am curious now:

Yess hopefully say can be brought in this middleware as well in the future 🚀