reaktor2 should handle the following commands: (@lassulus)

- `add-location cbase 53.562300 9.985700`
- `list-locations`
- `delete-location cbase`
- `18@p LOCATION [RADIUS]` (shows restaurants at location with a given radius in meters (default: 500))

`graph.r` should display the locations on the map. (@kmein)

it should be implemented using the cyberlocker

#### Prototype
- [2022-10-18/tv](http://p.r/1146mci)
- [2022-10-12/kmein](http://p.r/0vf5h0j)