Automatically retrieve metabase data

[rgaudin]

Now that we have the data we want in metabase, we need to prepare for its automated use.
Ultimate goal is to reconfigure mirrorbrain using this data but this will require external glue code that's not a concern at the moment. Also we still dont know how we'll configure (see kiwix/container-images#263)

Here we want to have a sample script that can take params (filters) and queries the Metabase questions we built and retrieves its information in a parsable form.