feat: Add support for Hidden and Private Commands

[TekWizely]

You can mark a command as hidden with '.':

.hidden:
    echo "This command is hidden"

• Can be invoked by command config RUN actions
  • RUN actions do not need to use '.'
• Will not show in CLI list of available commands
• Can still be invoked via CLI using '.name'

You can mark a command as private with '!':

!private:
    echo "This command is private"

• Can only be invoked by command config RUN actions
  • RUN actions do not need to use '!'
• Will not show in CLI list of available commands
• Cannot be invoked from CLI

---

TODO

• Update Docs

[TekWizely]

To anyone following along,
I initially used @ for hidden as I feel users of make already associate it with a form of suppression, but grinding on it more, I don't love it for this use case.

I'm going to re-work this to use . as the hidden indicator:

• It is more globally associated with the idea of 'hidden'
• It pairs rather nicely with ! for private.

ie:

.hidden
!private

I'll be updating the PR shortly.

[nikolay]

This is really nice, and the syntax is intuitive! Thank you!

[TekWizely]

Hey @nikolay I always appreciate your input, thanks ! merging now ...