Add: tool to visualize Line-of-sight

[erwanp]

Idea : add a new tool with a Flowchart to show the line-of-sight being computed.

Would make the config function more obvious. :

Let's say we have :

def config(**slabs):
        return SerialSlabs(MergeSlabs(slabs['sPlasmaCO'], slabs['sPlasmaCO2']), slabs['sPostCO2'], slabs['sRoomCO2'])

We would get something like : :

(not sure about the eye 👁️ :) )

Clicking on the Spectra would return the current Spectrum conditions (easy to embed in a .svg with Spectrum.get_conditions()), but that would be asking for a lot already!

Implementation Idea

Graphviz produces light .svg files that can even be made interactive. Good example here (but should be horizontal ?).

We may require the "inspect" module to parse the code given by the user in the Config function ; or add another way to input the line-of-sight; maybe a class that would retain the relationships between the different spectra of the line-of-sight in a graph, be able to plot itself, and compute the resulting line-of-sight spectrum on demand (and recompute if some spectrum of the graph are updated with new entries).