Stylistic map UIs and MapBox styles

Fancied up the map in the onroad UI and added toggles to use a custom MapBox style when using "Navigate on openpilot",

Co-Authored-By: mike8643 <98910897+mike8643@users.noreply.github.com>
Co-Authored-By: pencilpusher <83676301+jakethesnake420@users.noreply.github.com>
Co-Authored-By: multikyd <72329880+multikyd@users.noreply.github.com>

selfdrive/ui/qt/maps/map.h

@@ -77,10 +77,13 @@ private:
   void clearRoute();
   void updateDestinationMarker();
   uint64_t route_rcv_frame = 0;
+  uint64_t model_rcv_frame = 0;
 
   // FrogPilot variables
   Params params;
 
+  int previous_map_style;
+
 private slots:
   void updateState(const UIState &s);