Start darktable directly in Map mode

Is your feature request related to a problem? Please describe.
Not related to a reported problem. It is a new feature.
I would like to be able to start DT, from the command line, directly in Map View.

Describe the solution you'd like
Something like
$ darktable --mapview imagedir
Here imagedir is the directory where the images reside.
It could perhaps be implemented as a automatic switch after
$ darktable imagedir
which opens the image directory in lightroom. A subsequent switch to mapview would be sufficient.

Alternatives
As far as I'm aware, there are no alternatives. DT can already do the job.

Additional context
I see two use-cases:

• Ease of use: Quickly display images on a map, without involving needing anything further knowledge. Although it may save just one mouse click, it doesn't require any further knowledge of DT.
• Starting of DT from another application, to view the mentioned map.

Start by tracing darktable's command-line startup handling and the existing entry point for switching to Map View. Confirm how an image directory is opened and define the behavior for a new map-view launch option; done means darktable can open the supplied directory directly in Map View from the command line.