feat: add superfig paper-figure toolkit

Standalone LaTeX/TikZ skill for non-tensor paper figures: node/edge
macros, lint-on-warning build, golden examples, and negative fixtures.

tests/lint-invalid/hue-budget.tex

@@ -0,0 +1,14 @@
+\documentclass{standalone}
+\usepackage[en]{superfig}
+\sfsetrole{a}{sfTeal}
+\sfsetrole{b}{sfOrange}
+\sfsetrole{c}{sfCoral}
+\sfsetrole{d}{sfViolet}
+\sfsetrole{e}{sfInk}
+\begin{document}\begin{tikzpicture}
+\sfnode[role=a, at={(0,0)}]{A}{A}{8mm}{8mm}
+\sfnode[role=b, at={(12mm,0)}]{B}{B}{8mm}{8mm}
+\sfnode[role=c, at={(24mm,0)}]{C}{C}{8mm}{8mm}
+\sfnode[role=d, at={(36mm,0)}]{D}{D}{8mm}{8mm}
+\sfnode[role=e, at={(48mm,0)}]{E}{E}{8mm}{8mm}
+\end{tikzpicture}\end{document}