Rust port of Lucene's Ascii folding filter
From Lucene documentation:
This class converts alphabetic, numeric, and symbolic Unicode characters which are not in the first 127 ASCII characters (the "Basic Latin" Unicode block) into their ASCII equivalents, if one exists.
use asciifolding::fold_to_ascii;
assert_eq!(fold_to_ascii("Fıstıkçı Şuayip"), "Fistikci Suayip");