refactor: 💥 framework.h introduced + IWYU

test/static/isq_test.cpp

@@ -20,9 +20,9 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <mp-units/reference.h>
+#include <mp-units/framework.h>
 #include <mp-units/systems/isq/isq.h>
-#include <mp-units/systems/si/unit_symbols.h>
+#include <mp-units/systems/si/si.h>
 
 namespace {