Make sure that error codes are grouped in unified chunks

[msluszniak]

E.g. here:

react-native-executorch/scripts/errors.config.ts

Line 66 in 19cc916

TokenizerError: 0xa7,

TokenizerError has code that starts with 0xa but these seem to be reserved for SpeechToText errors below. There are potentially different issues with error codes that needs to be fixed. Then, we can document these groups in documentation