refactor generated command & subcommand boilerplate

[jxsl13]

• This is not my final image of how the commands should be constructed but my final image would require to work with the Go AST library which I am not familiar with and imo might be overkill.
• I usually do call rootCmd.AddCommand(NewSubCommand()) inside of the constructor NewRootCmd() which would be quite hard to do with generated code. cobra-cli would need to actually parse generated Go code and append lines at specific locations for that to work with sub commands that are added afterwards.

That's way too much work so I did go a slightly easier way.
Might not be the final stage but definitely a step forward.

[jxsl13]

@johnSchnake please review

[jpmcb]

Hi there - thanks for providing this.

Overall, looks good but I'm wondering if we want to do some work to define the recommended approach in our docs and examples before we go forward with merging this.

I like the idea of removing the init chunks

John S. has good eyes on this too, so would also like his input.

I think @marckhouzam can give some recommendation here too as to what Helm does.

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[marckhouzam]

Still haven't gotten around to this one. Sorry.

[jpmcb]

No worries!!!! We can mark this for post v1.5.0 if that makes sense?

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[jxsl13]

blub

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