Provide a Sabre\CardDAV\Backend\BackendInterface implementation for Eloquent

[edhelas]

For the moment CardDAV addressbooks are handled using the existing PDO connector Sabre\CardDAV\Backend\PDO.

Having an example Laravel migration that creates the base tables that can easily be mapped to the Sabre ones could be useful.

Base tables can be found there https://github.com/sabre-io/dav/blob/master/examples/sql/mysql.addressbooks.sql

[DellanX]

I'd definitely second this need. I have an application that has a lot of data that is a duplicate of data stored in the Sabre tables.

I'd also be willing to help implement this feature. But to do so I'd like to first get insight from the repo maintainers on how/where they'd prefer me to make the change.

[TimHoepfner]

+1