🔧 Sanity check IA_CREALITY mesh size

Marlin/src/inc/SanityCheck.h

@@ -1552,6 +1552,9 @@ static_assert(COUNT(arm) == LOGICAL_AXES, "AXIS_RELATIVE_MODES must contain " _L
 #if HAS_MESH && HAS_CLASSIC_JERK
   static_assert(DEFAULT_ZJERK > 0.1, "Low DEFAULT_ZJERK values are incompatible with mesh-based leveling.");
 #endif
+#if HAS_MESH && DGUS_LCD_UI_IA_CREALITY && GRID_MAX_POINTS > 25
+  #error "DGUS_LCD_UI IA_CREALITY requires a mesh with no more than 25 points as defined by GRID_MAX_POINTS_X/Y."
+#endif
 
 #if ENABLED(G26_MESH_VALIDATION)
   #if !HAS_EXTRUDERS