Running code from visualization module requires LaTeX

[MatthewFlamm]

It isn't documented that LaTeX is a required dependency, however when attempting to run the example code hello_world with pyopmspe11 -i spe11b.txt -o spe11b -m all -g all -t 5 -r 50,1,15 -w 1, it fails when it cannot detect these packages. This line seems to enforce this requirement

pyopmspe11/src/pyopmspe11/visualization/plotting.py

Line 21 in 1723348

"text.usetex": True,

In my opinion, it would be better to remove this requirement, if possible without removing key functionality, as it will make it more widely usable. Otherwise, it should be documented as a requirement in some way.

Related to openjournals/joss-reviews#7357.