Email Service and Private-p2p Sync Model for `Newsrc`

I believe we have reached consensus to move towards a private P2P sync model for subscriptions, which will be a much larger project, and we are waiting for private sync to be ready. So, in the meantime, we should bring back the simple centralized email system.

Check: newsrc

Steps

Resume the current email stand-alone service as it is, fixing the daily activity emails.

Finish Private Documents.

Write down a project about the Newsrc using our Sync Engine to sync subscription lists, read-unread lists, and mail lists to the network.

Adapt the email standalone architecture to the new Newsrc Syncing Object.

Execute week on week, delivering value to users.