Add support for script comment/description

[manzoorwanijk]

Add support for script comment/description

[rictic]

I like description. We could also display it when you hover over a dependency.

[vassudanagunta]

even if you just reserved the "description" key for use only by comments, without any added functionality, it would be good. I am already using "description".

Ideally the CLI should support some way to show the description for every wireit-based command, optionally showing descriptions recursively for all dependencies. Perhaps that's what should happen when one executes wireit directly, as opposed to via npm run.

[vassudanagunta]

I like description. We could also display it when you hover over a dependency.

I think description and comment are two different things. One provides a description of the command, to be shown on hover as you suggest, or via CLI as I suggested in my prior comment. But comment is a note about the implementation, perhaps a reminder to self of why it is done the non-obvious way it is done.