Improvement of Gettting started guide

[dipankardas011]

Want to add a getting started guide for a more flat learning curve

[dipankardas011]

where it will contain:
how to install cobra cli in linux
then very simple cli using the templates created by the cobra cli

[dipankardas011]

can anyone provide which file to modify

[umarcor]

Ref: #1245 (blocked by #1428)

[dipankardas011]

In the same page with better documentation

[github-actions]

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