put the guide into main deployment page

[rauerhans]

Summary

create the guide page from

https://pluralsh.notion.site/Getting-Started-With-Plural-Fleet-Management-b7fa404b35244832bad98e06671799f0

Labels

Test Plan

Checklist

• If required, I have updated the Plural documentation accordingly.
• I have added tests to cover my changes.
• I have added a meaningful title and summary to convey the impact of this PR to a user.
• I have added relevant labels to this PR to help with categorization for release notes.

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[rauerhans]

react-embed which we are using (https://github.com/pluralsh/design-system/blob/e45314b93c74708b654331077c1c6feb9a948e4c/src/markdoc/components/Embed.tsx)
interprets all mp4 files as audio, so embedding the video natively doesn't work in that format:
streamich/react-embed#866

Maybe if we store the asset as .webm it'll display correctly

[samweaver]

approved, squashed and merged