Add child command usage in help text

[NikiforovAll]

Here is a little proof of concept for #11.

Let's determine the next things:

• Q1: Do we always want to show verbose usage every time the help for root command is provided? We could show it only when --help is specified explicitly.
• Q2: Do we want to show verbose usage for sub-commands?
• Q3: How can we make usage shorter and more user-friendly in the case when the application executable consists of "dotnet MyProgram.dll"?

Note, this is not final implementation. I've created this to communicate ideas and clarify the next steps.

E.g.

Closes: #11

[Tyrrrz]

Cool!

Q1: Do we always want to show verbose usage every time the help for root command is provided? We could show it only when --help is specified explicitly.

I think for starters we can make it show every time. Later, if we need to, we can adapt.

Q2: Do we want to show verbose usage for sub-commands?

What do you mean by "verbose" here? The example on your screenshot looks good to m e.

Q3: How can we make usage shorter and more user-friendly in the case when the application executable consists of "dotnet MyProgram.dll"?

I think we should keep it as is for now. We can revisit it in a new PR/issue.

[Tyrrrz]

Poke @NikiforovAll. Are you still working on this?

[NikiforovAll]

Poke @NikiforovAll. Are you still working on this?

Not really, but I plan to start working on it this weekend.

[Tyrrrz]

Cool! I'm planning to make a refactoring soon, so wanted to align with the PRs.

[NikiforovAll]

I've removed the process name from usage. This is aligned with other CLIs best practices, e.g git, gh. Demo:

Last descendant command:

A Command with multiple possibly nested sub-commands:

Root:

Command not found:

[Tyrrrz]

Thanks!