Contributing figures

When an issue is resolved, add a corresponding TikZ figure to the docs.

Draw it with the sources in docs/diagrams/ (shared style fritzstrings.sty). Rebuild the SVG with docs/diagrams/build.sh, then copy that SVG into docs/_static/figures/. Put the figure on the relevant page in both English and Japanese, with a caption in each language. The same steps are written in docs/_static/figures/README.md.

The diagrams shipped with the README are already in that folder: composition, tensor product, the three copy laws, naturality of discard, Bayesian inversion, almost-sure equality, exchangeability, Kolmogorov consistency, and named marginals and permutations.

conditional_independence.tex is a LuaLaTeX figure, so docs/diagrams/build.sh skips it. Its SVG and PNG are already in docs/_static/figures/. The figure is read bottom to top.