EXTENSIBLE_UI Joystick support (#15303)

Marlin/src/lcd/extensible_ui/ui_api.h

@@ -45,6 +45,11 @@
 #include "../../inc/MarlinConfig.h"
 
 namespace ExtUI {
+
+  #if ENABLED(JOYSTICK)
+    extern float norm_jog[];
+  #endif
+
   // The ExtUI implementation can store up to this many bytes
   // in the EEPROM when the methods onStoreSettings and
   // onLoadSettings are called.
@@ -79,6 +84,8 @@ namespace ExtUI {
   void enableHeater(const heater_t);
   void enableHeater(const extruder_t);
 
+  void jog(float dx, float dy, float dz);
+
   /**
    * Getters and setters
    * Should be used by the EXTENSIBLE_UI to query or change Marlin's state.