add support for 6 tramming points

[Links2004]

add assert if to many points are configured

Benefits

bump maximum tramming points handled form 5 to 6.
this is for example needed for a tronxy x5sa pro which has 6 points to adjust.

add check if to many points a configured, this is needed since if too many points a configured the firmware crashes since its tryes to print binary data as string.
array out of index access for tramming_point_name at the end of the G35 run in the result printing code.

Configurations

//
// Add the G35 command to read bed corners to help adjust screws. Requires a bed probe.
//
#define ASSISTED_TRAMMING
#if ENABLED(ASSISTED_TRAMMING)

  // Define positions for probing points, use the hotend as reference not the sensor.
  #define TRAMMING_POINT_XY { { 20, 20 }, { 165, 20 }, { 285, 20 }, { 285, 308 }, { 165, 308 }, { 20, 308 } }

  // Define positions names for probing points.
  #define TRAMMING_POINT_NAME_1 "Front-Left"
  #define TRAMMING_POINT_NAME_2 "Front-Mid"
  #define TRAMMING_POINT_NAME_3 "Front-Right"
  #define TRAMMING_POINT_NAME_4 "Back-Right"
  #define TRAMMING_POINT_NAME_5 "Back-Mid"
  #define TRAMMING_POINT_NAME_6 "Back-Left"

  #define RESTORE_LEVELING_AFTER_G35    // Enable to restore leveling setup after operation
  #define REPORT_TRAMMING_MM            // Report Z deviation (mm) for each point relative to the first

  #define ASSISTED_TRAMMING_WIZARD    // Add a Tramming Wizard to the LCD menu

  //#define ASSISTED_TRAMMING_WAIT_POSITION { X_CENTER, Y_CENTER, 30 } // Move the nozzle out of the way for adjustment

  /**
   * Screw thread:
   *   M3: 30 = Clockwise, 31 = Counter-Clockwise
   *   M4: 40 = Clockwise, 41 = Counter-Clockwise
   *   M5: 50 = Clockwise, 51 = Counter-Clockwise
   */
  #define TRAMMING_SCREW_THREAD 30

#endif

Related Issues

never searched,I simply fixed the code ;)