Add RACK_AND_PINION_PROBE (#12218)

Marlin/src/config/examples/Infitary/i3-M508/Configuration.h

@@ -786,6 +786,13 @@
 //#define Z_PROBE_SLED
 //#define SLED_DOCKING_OFFSET 5  // The extra distance the X axis must travel to pickup the sled. 0 should be fine but you can push it further if you'd like.
 
+// A probe deployed by moving the x-axis, such as the Wilson II's rack-and-pinion probe designed by Marty Rice.
+//#define RACK_AND_PINION_PROBE
+#if ENABLED(RACK_AND_PINION_PROBE)
+  #define Z_PROBE_DEPLOY_X  X_MIN_POS
+  #define Z_PROBE_RETRACT_X X_MAX_POS
+#endif
+
 //
 // For Z_PROBE_ALLEN_KEY see the Delta example configurations.
 //