occt: add point wrapper to create, delete and get coordinates

src/occt/include/point.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <gp_Pnt.hxx>
+
+extern "C" {
+    struct Point {
+        double x;
+        double y;
+        double z;
+    };
+
+Point* make_point(double x, double y, double z);
+void free_point(Point* p);
+void coord_point(const Point* p, double* x, double* y, double* z);
+}