Very WIP PR to add a map generator

[zig-for]

This does require a pip install graphviz or similar.

I'm not proud of the code in here, but I'm cleaning it up as I go along.

[CaitSith2]

Since this does require graphviz, add a line to ./resources/app/meta/manifests/pip_requirements.txt for this requirement. That is the reason the automated checks that prepare a release are failing. (It explicitly installs the requirements listed in ./resources/app/meta/manifests/pip_requirements.txt.

[zig-for]

Thanks @CaitSith2 - I was wondering how dependency management worked for this.