Probe Tare, Probe Activation Switch (#20379)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>
Co-authored-by: Victor Mateus Oliveira <rhapsodyv@gmail.com>
Co-authored-by: Jason Smith <jason.inet@gmail.com>

Marlin/src/module/probe.h

@@ -210,6 +210,10 @@ public:
     static void set_probing_paused(const bool p);
   #endif
 
+  #if ENABLED(PROBE_TARE)
+    static bool tare();
+  #endif
+
 private:
   static bool probe_down_to_z(const float z, const feedRate_t fr_mm_s);
   static void do_z_raise(const float z_raise);