Feat: importation des tools

tools/skeleton/sequence/exercises.tex

@@ -0,0 +1,10 @@
+\collectexercises{banque}
+\begin{exercise}[subtitle={<++>}, step={1}, origin={<++>}, topics={\Var{title}}, tags={\Var{tags}}]
+    <++>
+\end{exercise}
+
+\begin{solution}
+    <++>
+\end{solution}
+
+\collectexercisesstop{banque}