Fixes MSVC redefinition of min/max

Adds a compiler definition for MSVC to prevent redefinition of min/max macros by the Windows SDK.

Removes unnecessary undef directives in color.hpp as the NOMINMAX definition now handles the issue.

include/omath/color.hpp

@@ -8,14 +8,6 @@
 #include "omath/vector4.hpp"
 #include <cstdint>
 
-#ifdef max
-#undef max
-#endif
-
-#ifdef min
-#undef min
-#endif
-
 namespace omath
 {
     struct Hsv