shape now has shape_get_points for getting the List of points

src/shape.c

@@ -141,6 +141,10 @@ void shape_insert_point(Shape* self, size_t at, Vector point) {
     list_insert(&self->points, &point, at);
 }
 
+List* shape_get_points(Shape* self) {
+    return &self->points;
+}
+
 Vector shape_remove_point(Shape* self, size_t at) {
     Vector point = *list_at_as(Vector, &self->points, at);
     list_erase(&self->points, at);