OpenSnitch integration

[olalie]

Support using OpenSnitch as a data source for historical connection information.

This could provide additional context and longer-term views than live network data alone.

Original issue:
#59

[bMorgan01]

Consider additionally supporting arbitrary APIs. You could add a YAML config file that maps an API endpoint/URL and a JSON key to each field that Tapmap needs. This would enable users to query connections from dedicated firewall devices.

Would also love if Tapmap supported displaying blocked connections in red.