Clean up commented code and documentation for publication

[Copilot]

Prepare codebase for NuGet publication by removing development artifacts and fixing documentation issues.

Code cleanup

• Removed 60 lines of commented-out code from commands, services, and project file
• Deleted test target Foo from bld.csproj
• Removed TODO markers and unused option definitions

Documentation

• Fixed typo: "doe to" → "due to"
• Completed incomplete sentence about global.json handling

Warnings

• Suppressed CS1998 false positives for async iterator methods (methods returning IAsyncEnumerable<T> with yield return must be declared async even without await)

Original prompt

Based the code in the beta branch, tidy up the code and docs for publish.

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