feat: add superderive stepwise derivation figures

A third sibling toolkit: rewrite steps, justification rails, cancel/substitute highlights, and lint-on-warning builds.
2026-08-17 10:05:03 +08:00
commit 9f635d358b
22 changed files with 724 additions and 0 deletions
@@ -0,0 +1,7 @@
+\usepackage[en]{superderive}
+\begin{document}\begin{tikzpicture}
+\sdrow{R1}
+  \sdbox{a}{x}
+  \draw (0,0) -- (1,0);
+\sdrowend
+\end{tikzpicture}\end{document}