Add Dependency Chord Visualisation

[Nagelfar]

A draft visualisation from @saintedlama can be extended and integrated into Contexture. Similar to the existing visualisations all directed dependencies of the search results can be presented with the mentioned visualisation.

The idea behind this visualisation is to give a broad overview on dependencies between bounded contexts and domains.

All Bounded Contexts (ordered by Domain) are placed on the outside of the circle. For each dependency one directed arch is drawn to the receiving side. An example based on the restaurant-db.json:

A visualisation of a more advanced domain (with redacted names) with highlighting: