[ENHANCEMENT]: Add help for core commands

[anshumanv]

Is your feature request related to a problem? Please describe.
We can have help commands for individual core commands for ex webpack-cli create --help

Describe the solution you'd like
Check if the help flag is present along with the core command and then print relative command.

Describe alternatives you've considered
NA

Additional context
Would love suggestions on this and will implement once agreed.

[anshumanv]

@evenstensberg @ematipico wdyt about this?

Here's how vue does this.

[evenstensberg]

Yep we should do that if invoked with command syntax

[anshumanv]

Adding them in that case 👍

[evenstensberg]

Need help with this?

[anshumanv]

Need help with this?

Not yet, will send a patch in some time! :)