mousekey: expose current report to users (#13069)

quantum/mousekey.c

@@ -486,3 +486,5 @@ static void mousekey_debug(void) {
     print_dec(mousekey_accel);
     print(")\n");
 }
+
+report_mouse_t mousekey_get_report(void) { return mouse_report; }

quantum/mousekey.h

@@ -173,6 +173,7 @@ void mousekey_on(uint8_t code);
 void           mousekey_off(uint8_t code);
 void           mousekey_clear(void);
 void           mousekey_send(void);
+report_mouse_t mousekey_get_report(void);
 
 #ifdef __cplusplus
 }