bijoyToUnicode function
Converts one Bijoy/ANSI run to Unicode Bangla.
Implementation
String bijoyToUnicode(String ansi) {
if (ansi.isEmpty) return ansi;
var text = _restoreLogicalOrder(_substitute(_canonicalBijoy(ansi)));
for (final entry in _nuktaComposition.entries) {
text = text.replaceAll(entry.key, entry.value);
}
return text;
}