extend ToolInfoV0 with command visibility

[heckj]

• resolves help-dump structures should reflect hidden attribute for commands as well as arguments #668 by extending the ToolInfoV0 (help dump) struct to include visibility information for commands (already exists for arguments).
• updates test output to verify existing examples extend with the additional key.

Checklist

• I've added at least one test that validates that my change is working, if appropriate
• I've followed the code style of the rest of the project
• I've read the Contribution Guidelines
• I've updated the documentation if necessary

[rauhul]

can you add = true as a fall back for older json generated before this option was introduced?

[heckj]

Updated now - apologies for the delay, didn't have my laptop with me for the past week. Updated and rebased to resolve conflicts.

[rauhul]

small change needed, otherwise looks good

[rauhul]

@swift-ci test

[heckj]

Thanks @rauhul - I missed one piece in the rebasing I think, just made a further commit to line that up properly, so next round should sail through CI without issue.. I hope. Locally verified, anyway.

[natecook1000]

@swift-ci Please test

[rauhul]

Sorry for the last minute nit pick, can we add a test case that results in false appearing in the json?

We can update struct C: ParsableCommand { to cover this case

[heckj]

@rauhul Sure, can definitely do that.

[heckj]

I've updated the existing test - command c now includes a configuration that "hides" it to illustrate the hiding in effect during dump. It changed the existing output rather than adding a new test case explicitly, so I think this covers what we're after, but if you want the same idea in it's own test case, I can revert the last commit and create a d command that illustrates a hidden command in the output.

[rauhul]

ship it!

[rauhul]

@swift-ci test