Enhance repeat_grid function: add spacing parameters for customizable grid spacing

examples/Repeat Grid.py

@@ -1,15 +1,21 @@
 from geometry_script import *
 
 @tree("Repeat Grid")
-def repeat_grid(geometry: Geometry, columns: Int, rows: Int):
+def repeat_grid(
+    geometry: Geometry,
+    columns: Int,
+    rows: Int,
+    spacing_x: Float = 0.0,
+    spacing_y: Float = 0.0
+):
    # measure your geometry’s bounds
     bbox = geometry.bounding_box()
     span_x = bbox.max.x - bbox.min.x
     span_y = bbox.max.y - bbox.min.y
 
     # total grid size = N * object size
-    total_x = columns * span_x
+    total_x = columns * span_x + (columns - 1) * spacing_x
-    total_y = rows    * span_y
+    total_y = rows    * span_y + (rows - 1) * spacing_y
 
     # one extra vertex gives N cells
     g = grid(