Migrating old Argo docs and applying minor updates

[kcpevey]

This PR migrates over the old Argo docs and also provides some updates that are coming from PR nebari-dev/nebari#1639 .

Reference Issues or PRs

fixes #48

fixes #49

What does this implement/fix?

Put a x in the boxes that apply

• Documentation Update

Testing

• Did you test the pull request locally?

Documentation

Access-centered content checklist

Text styling

• The content is written with plain language (where relevant).
• If there are headers, they use the proper header tags (with only one level-one header: H1 or # in markdown).
• All links describe where they link to (for example, check the Nebari website).
• This content adheres to the Nebari style guides.

Non-text content

• All content is represented as text (for example, images need alt text, and videos need captions or descriptive transcripts).
• If there are emojis, there are not more than three in a row.
• Don't use flashing GIFs or videos.
• If the content were to be read as plain text, it still makes sense, and no information is missing.

Any other comments?

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[kcpevey]

I'm taking this out of draft for some feedback. I'd like to see what @ericdatakelly has been working on. I'm leaning towards getting this merged quickly rather than "making it fancy", but I'll let @pavithraes and @trallard respond to that.

[pavithraes]

@kcpevey Thank you for working on this, it looks good to me.

I've mainly just added style-guide-related suggestions for consistency. Other than that, I think the using-argo.md can be moved to the how-tos section -- mainly because I think tutorials are intended to be to complete end-to-end examples? What do you think?

I do agree that we can merge this migrating PR and make updates as we go. :)

[kcpevey]

@pavithraes your requested changes have been made. This is ready for final review and merge!

[pavithraes]

✨