Update SPLIT() to accept integers as delimiter, breaking text into X-size chunks

[GreenFlux]

The SPLIT() function uses a text input for the ‘split-by’ parameter. This request is for SPLIT to be updated to also split by an integer.

SPLIT("ABCD",1) = A,B,C,D

SPLIT("1234567890",2) = 12, 34, 56, 78 ,90