Estuary Support

[TheDiscordian]

Using Estuary users could store data long-term for free using the Filecoin network. I think this would be a nice alternative to #42 (but don't worry, both issues are accepted).

[TheDiscordian]

Looks like this should be easy:

1. Hit this API: https://api.estuary.tech/pinning/pins
2. With { "name": "root dir name", "cid": "cidofrootdir" }
3. Include in header Authorization: Bearer API_KEY_HERE

[TheDiscordian]

Actually that commit only supports adding pins, let's add removal support too.