feat: settings sync via atproto account

[fatfingers23]

WIP

• Endpoints are done. It's done in set all settings, or get all settings not sure if that will be best
• watch on the settings page to post them
• Still need to iron out syncing with the browser to update the UI and I was setting some get -> post on page load of settings

Posting as a draft for #484 to share work with another contributor

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