Add typing for bool flag values

[WilliamDee]

Seems like with the version bump of click, flags are now rendering incorrectly without the type=click.BOOL being set. Ie.,

export FLAG_ENV_VAR=FALSE -> resolves to True

and none of the click falsey values are being respected (ie., 0, false, off).

Problem

Solution

Checklist

• I have read the contributing guide and understand what's expected of me.
• I have run this code in development, and it appears to resolve the stated issue.
• This PR includes tests, or tests are not required or relevant for this PR.
• This PR has no interface changes (e.g., macros, CLI, logs, JSON artifacts, config files, adapter interface, etc.) or this PR has already received feedback and approval from Product or DX.
• This PR includes type annotations for new and modified functions.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.36%. Comparing base (2a96f8c) to head (1290609).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12361   +/-   ##
=======================================
  Coverage   91.36%   91.36%           
=======================================
  Files         203      203           
  Lines       25092    25092           
=======================================
  Hits        22925    22925           
  Misses       2167     2167           

Flag	Coverage Δ
integration	88.23% <ø> (-0.01%)	⬇️
unit	65.30% <ø> (ø)

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

Components	Coverage Δ
Unit Tests	65.30% <ø> (ø)
Integration Tests	88.23% <ø> (-0.01%)	⬇️

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[QMalcolm]

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