feat (web-api / types): Add support for assistant.threads.* API

[misscoded]

Summary

Adds support for assistant.threads.* endpoints, including:

• assistant.threads.setStatus
• assistant.threads.setSuggestedPrompts
• assistant.threads.setTitle

Requirements (place an x in each [ ])

• 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 92.51%. Comparing base (0c1ceb5) to head (2bfcfa3).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2033      +/-   ##
==========================================
+ Coverage   92.48%   92.51%   +0.02%     
==========================================
  Files          37       37              
  Lines        9946     9981      +35     
  Branches      633      633              
==========================================
+ Hits         9199     9234      +35     
  Misses        747      747              

Flag	Coverage Δ
cli-hooks	95.23% <ø> (ø)
cli-test	96.00% <ø> (ø)
oauth	81.52% <ø> (ø)
socket-mode	59.08% <ø> (ø)
web-api	97.29% <100.00%> (+0.01%)	⬆️
webhook	97.07% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[misscoded]

@filmaj These are used in the implementation for Bolt, but figured they should go in now. Let me know if you prefer these to be separate!

[filmaj]

LGTM, left one suggestion re: factoring out a type and specifying "at least 1" (if applicable).

As for the formatting, I recently changed the linter (#2006), and I don't think I re-ran generating the response types since then. @misscoded can you try resetting your node_modules folder and running the lint task locally? rm -rf node_modules package-lock.json && npm it. I have a feeling that will fix the response types and tighten up the diff in this PR.