Speed limit controller

Added toggle to control the cruise set speed according to speed limit supplied by OSM, NOO, or the vehicle itself.

Co-Authored-By: Jacob Pfeifer <jacob@pfeifer.dev>
Co-Authored-By: Efini <19368997+efini@users.noreply.github.com>
Co-Authored-By: Kumar <36933347+rav4kumar@users.noreply.github.com>

selfdrive/frogpilot/ui/control_settings.h

@@ -22,6 +22,8 @@ private:
   void updateMetric();
   void updateToggles();
 
+  ButtonControl *slscPriorityButton;
+
   FrogPilotButtonIconControl *modelSelectorButton;
 
   FrogPilotDualParamControl *aggressiveProfile;