Create additional information lookup service using remote APIs and local databases

We put the following item on the last roadmap we made in Mexico City:

Create an additional information lookup service using remote APIs (RIPEstat) and local databases (MaxMind). Consider adding back the relays by country graph to Tor Metrics.

However, our plans have changed and we dropped it from the new roadmap we made in Brussels. Creating this ticket to remember the idea even though we're currently not working on it.