chore: import upstream snapshot with attribution

cpp_easygraph/functions/path/mst.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "../../common/common.h"
+
+class UnionFind {
+   public:
+    UnionFind();
+    UnionFind(std::vector<node_t> elements);
+    node_t operator[](node_t object);
+    void _union(node_t object1, node_t object2);
+
+   private:
+    std::unordered_map<node_t, node_t> parents;
+    std::unordered_map<node_t, unsigned int> weights;
+};
+
+py::object kruskal_mst_edges(py::object G, py::object minimum, py::object weight, py::object data, py::object ignore_nan);
+py::object prim_mst_edges(py::object G, py::object minimum, py::object weight, py::object data, py::object ignore_nan);
+py::object boruvka_mst_edges(py::object G, py::object minimum, py::object weight, py::object data, py::object ignore_nan);