Section 23.2 - Kruskal and Prim (legacy compatibility path)
Third-edition-numbered compatibility path for the Kruskal and Prim algorithms. The canonical
fourth-edition source is
CLRSLean.FourthEdition.Chapter_21.Section_21_2_Kruskal_And_Prim;
this module forwards to it so legacy imports keep working during the
compatibility period (see docs/migrations/clrs4.md).