Rename utils.h to avoid collision with library. (#2730)

src/meshUtils.h

@@ -0,0 +1,7 @@
+#pragma once
+
+/// C++ v17+ clamp function, limits a given value to a range defined by lo and hi
+template <class T> constexpr const T &clamp(const T &v, const T &lo, const T &hi)
+{
+    return (v < lo) ? lo : (hi < v) ? hi : v;
+}