feat: unsubscribe from summary emails

[nickoferrall]

Fix https://github.com/ParabolInc/parabol/issues/7178

This builds on top of https://github.com/ParabolInc/parabol/pull/7183 as there's similar functionality.

https://www.loom.com/share/9b2ac67531124ec88936334a614853c8

To test

• [ ] Make sure that you have added the Mailgun env variables from https://github.com/ParabolInc/action-devops/blob/4aa09acb2ddc8376aaabd11bfc5bcfd7380b9bf8/environments/local#L41-L43
• [ ] Add an email Notification Panel to the profile page
• [ ] The Notification Panel includes a checkbox that says "Send meeting summary emails"
• [ ] By default, the checkbox is checked and meeting summary emails are sent
• [ ] If it's unchecked, meeting summary emails are not sent to that user
• [ ] In the footer of the meeting summary, include an unsubscribe link

[tianrunhe]

Can you add metric to the mutation? 😎 I'm sure we want to know how many users turned that off.

[nickoferrall]

Can you add metric to the mutation? 😎 I'm sure we want to know how many users turned that off

Added!

[sonarqubecloud[bot]]

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