Feature nstx

[flothesof]

I've just added the geometry for NSTX based on https://iopscience.iop.org/article/10.1088/0029-5515/52/5/054012/meta
Adds the geometry as well as an entry in the table of configurations.

[codecov-io]

Codecov Report

Merging #309 into devel will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##            devel     #309      +/-   ##
==========================================
+ Coverage   41.02%   41.02%   +<.01%     
==========================================
  Files          79       79              
  Lines       23477    23478       +1     
==========================================
+ Hits         9632     9633       +1     
  Misses      13845    13845

Impacted Files	Coverage Δ
tofu/geom/utils.py	43.34% <100%> (+0.12%)	⬆️

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[Didou09]

Nickel pour moi !

[lasofivec]

Do you think we could add the obtained 2D cam image as an example ?

[Didou09]

We probably should,
At some point, when we have a bit more tokamaks, we'll probably plot all of them in a common figure to give an idea of their respective scale and with their associated plot_touch() images, to give a nice overview of all of them