Consider having a help option work by default but allow for option out in the API

[MarkMichaelis]

[SteveByerly]

@MarkMichaelis does #62 address this? essentially, you have to flag your help as 'hidden' so it isn't included

[jonsequitur]

I understand this to be related to invocation, e.g. the PR work that @Keboo, @PandaMagnus, and I worked on which I'll PR shortly.

[KathleenDollard]

Does this include having a way to hide an option because it's sort of obsolete. We are doing this here with --self-contained

[jonsequitur]

This is currently implemented by calling CommandLineBuilder.UseHelp with the understanding that app model decides if it is on by default. Dragonfruit turns this on by default.

@MarkMichaelis, please reopen if you think this is insufficient.