refactor: 💥 framework.h introduced + IWYU

example/capacitor_time_curve.cpp

@@ -24,7 +24,7 @@
 #ifdef MP_UNITS_MODULES
 import mp_units;
 #else
-#include <mp-units/math.h>  // IWYU pragma: keep
+#include <mp-units/math.h>
 #include <mp-units/ostream.h>
 #include <mp-units/systems/isq/electromagnetism.h>
 #include <mp-units/systems/si/si.h>