Add M851 X Y probe offsets (#15202)

config/examples/Formbot/T_Rex_2+/Configuration.h

@@ -917,11 +917,10 @@
 
 /**
  * Z Probe to nozzle (X,Y) offset, relative to (0, 0).
- * X and Y offsets must be integers.
  *
  * In the following example the X and Y offsets are both positive:
- * #define X_PROBE_OFFSET_FROM_EXTRUDER 10
- * #define Y_PROBE_OFFSET_FROM_EXTRUDER 10
+ *
+ *   #define NOZZLE_TO_PROBE_OFFSET { 10, 10, 0 }
  *
  *     +-- BACK ---+
  *     |           |
@@ -933,10 +932,10 @@
  *     |           |
  *     O-- FRONT --+
  *   (0,0)
+ *
+ * Specify a Probe position as { X, Y, Z }
  */
-#define X_PROBE_OFFSET_FROM_EXTRUDER -3      // X offset: -left  +right  [of the nozzle]
-#define Y_PROBE_OFFSET_FROM_EXTRUDER 31      // Y offset: -front +behind [the nozzle]
-#define Z_PROBE_OFFSET_FROM_EXTRUDER -1.25   // Z offset: -below +above  [the nozzle]
+#define NOZZLE_TO_PROBE_OFFSET { -3, 31, -1.25 }
 
 // Certain types of probes need to stay away from edges
 #define MIN_PROBE_EDGE 0
@@ -970,7 +969,7 @@
  *
  * Use these settings to specify the distance (mm) to raise the probe (or
  * lower the bed). The values set here apply over and above any (negative)
- * probe Z Offset set with Z_PROBE_OFFSET_FROM_EXTRUDER, M851, or the LCD.
+ * probe Z Offset set with NOZZLE_TO_PROBE_OFFSET, M851, or the LCD.
  * Only integer values >= 1 are valid here.
  *
  * Example: `M851 Z-5` with a CLEARANCE of 4  =>  9mm from bed to nozzle.
@@ -1228,12 +1227,6 @@
   #define GRID_MAX_POINTS_X 3
   #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X
 
-  // Set the boundaries for probing (where the probe can reach).
-  //#define LEFT_PROBE_BED_POSITION MIN_PROBE_EDGE
-  //#define RIGHT_PROBE_BED_POSITION (X_BED_SIZE - (MIN_PROBE_EDGE))
-  //#define FRONT_PROBE_BED_POSITION MIN_PROBE_EDGE
-  //#define BACK_PROBE_BED_POSITION (Y_BED_SIZE - (MIN_PROBE_EDGE))
-
   // Probe along the Y axis, advancing X after each column
   //#define PROBE_Y_FIRST