feat: Add support for using embedded images in email providers #5457
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What changed? Why was the change needed?
Given that some of the most used email clients don't support things like base64 images or SVGs as alternatives, using embedded images was the only way that I could get important graphics to display in an email.
https://www.caniemail.com/features/image-base64/
https://www.caniemail.com/features/html-svg/
This is also required to make any progress on #4671
closes #4668