dx: show help page by default

[Dentrax]

Describe the problem/challenge you have
To improve developer experience for the fresh installations, It think It had better to show help page instead of print out Succeeded.

$ kbld
Succeeded

Describe the solution you'd like

$ kbld
# show help page by default

$ kbld --help

<HELP MESSAGE HERE>

Succeeded

Anything else you would like to add:
I think we should not print out Succeeded log at the end of each output. Wdyt?

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[pivotaljohn]

Thank you, @Dentrax, for calling this out.

In fact, with the Carvel project, there's a greater issue of an inconsistent behavior.

I created an issue in the umbrella repository: vmware-tanzu/carvel#290 to track the broader question.

Will close this issue to keep the conversation about these thing over there.

Thanks again! 🙏🏻