feat: add version command

[rkpattnaik780]

Description

Add a version command so that user won't have to guess between --version or version.

fixes #469

Verification Steps

1. Run rhoas version

./rhoas version

2. You should see rhoas version <version> as the output

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Documentation added for the feature
• CI and all relevant tests are passing
• Code Review completed
• Verified independently by reviewer

[craicoverflow]

This is great, very neat PR.

Something that could be done in a follow up PR, or here if you prefer, would be to use the same version output defined in this command and to use it as the text for the --version flag. This way, if we ever want to change the text that is displayed, we only need to update the locales file and both will be changed!

See https://github.com/spf13/cobra#version-flag

[craicoverflow]

I never would have thought of adding this but it make so much sense! I did not see it in Cobra docs, how did you find out about it? 😄

[rkpattnaik780]

I noticed gh cli doesnt show version command, so I went on to check its implementation :) .

[craicoverflow]

Nice research work! Cobra's docs are a bit poor aren't they? There seems to be no API reference documentation which covers many configuration options.