feat: add module mp_units

test/unit_test/static/cgs_test.cpp

@@ -21,10 +21,14 @@
 // SOFTWARE.
 
 #include "test_tools.h"
+#ifdef MP_UNITS_MODULES
+import mp_units;
+#else
 #include <mp-units/systems/cgs/cgs.h>
 #include <mp-units/systems/isq/mechanics.h>
 #include <mp-units/systems/isq/space_and_time.h>
 #include <mp-units/systems/si/unit_symbols.h>
+#endif
 
 template<class T>
   requires mp_units::is_scalar<T>