Feat/callout amends

[joshuaellis]

Why

• resolves #223

What

• Adds companion logo to CMS
• Adds mediaItems to Callout where multiple pieces of media can be added
• Use getRandomInt to decide which image to show on the FE SiteCallout component

Checklist

• [x] Ready to be merged

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Name	Status	Preview	Updated
companion-studio	✅ Ready (Inspect)	Visit Preview	May 30, 2022 at 8:05AM (UTC)