Add cli support for Grafico

[sandervd]

I was looking into publishing HTML reports from Archi from a Grafico repository whenever a commit happens to the Grafico repo. I was thinking to build something with drone.io and Archi running in a Docker container to do the actual conversion. This was when I noticed that the cli support was missing for Grafico, so I thought it would be a nice dive in to Archi to add it.

I probably made a ton of noob mistakes, as this is the first time I write something in Java.

[Phillipus]

Hi Sander!

You've done some great stuff there. But before going any further did you know that Grafico has been superseded by the collaboration plugin - https://github.com/archi-contribs/archi-modelrepository-plugin ?

There is a CLI plugin there that loads a model from the repo, and this can then be chained to generate a HTML report.

[jbsarrodie]

Hi,

As Phil said that' great work, but Grafico is really outdated (and I have to make it clear on the README). No one should use it now that the Collaboration plugin exists (and offers the command line). The key point is that the format used by this plugin is nothing more than Grafico.

In addition, using the Collaboration plugin fixes several small bugs or side effects of Grafico.