Better visualizations of full dependency tree

[ZLLentz]

It should be possible to create a dependency tree using both the conda/mamba dependency information and the pip metadata, which do not necessarily agree. It should be possible to make it more readable than the pipdeptree graphviz output which works great for small trees but is not designed for such large environments.

[ZLLentz]

I'd like to pick a format that creates more of an interactive view

[ZLLentz]

https://github.com/pydot/pydot
https://gephi.org/
https://observablehq.com/@d3/force-directed-graph-component

[ZLLentz]

This is a candidate for CI output too, to make it easier to understand why a CI build's environment has certain packages in it

[ZLLentz]

Since this will be custom, it can also include nodes like "conda-packages.txt" etc. to include info about which packages are directly specified in our environment spec