Add graphviz as dependency so pip could install it automatically

[Petrox]

This would solve the docker container customization with every new release overhead for any users here.

automatic apt-getting in the container env is decided to be not implemented
inventree/InvenTree#5718

[SchrodingersGat]

Can this be installed via pip?

[Petrox]

pip3 install graphviz
Collecting graphviz
  Using cached https://files.pythonhosted.org/packages/9d/fb/886e8ec7862989afc0c35d15813b6c665fe134cc6027cdde2fa300abe9a2/graphviz-0.19.1-py3-none-any.whl
Installing collected packages: graphviz
Successfully installed graphviz-0.19.1

[SchrodingersGat]

Right, but the python graphviz package is already installed as part of wireviz

Is this not getting installed automatically?

[Petrox]

TBH I didn't check if it installs it or not, I've read the readme some time ago that it depends on graphviz and I should install it.

WireWiz requires GraphViz to be installed in order to work. See the GraphViz download page for OS-specific instructions.

Maybe it is not necessary at all if graphviz (python package) is installed?

When I was using the stable container I got the error, that it could not find the graphviz binary, so it either not included in the pip package or not in PATH inside the container.

[SchrodingersGat]

To be clear, the graphviz python package gets installed automatically, as part of this plugin, but you need to have the graphviz binary also installed on your system - I don't think PIP takes care of this part