Introduce new `version` sub command

[Dentrax]

It would better to provide a new version sub command to cobra-cli:

Actual:

$ cobra-cli version
Error: unknown command "version" for "cobra-cli"

$ cobra-cli --version
Error: unknown flag: --version

Wdyt?

[github-actions]

This issue is being marked as stale due to a long period of inactivity

[Dentrax]

/remove-lifecycle stale

[christianh814]

Just +1-ing this

[andreaangiolillo]

Hello 👋 ,
My PR is ready for review.

Thanks!

[github-actions]

This issue is being marked as stale due to a long period of inactivity

[andreaangiolillo]

not stale

[github-actions]

This issue is being marked as stale due to a long period of inactivity