String Decryption Update

[andrewathalye]

TLDR: See https://github.com/andrewathalye/destiny-string-tool/blob/master/src/string_tool.adb

It looks like string decryption occurs by converting the raw string to utf 32 and adding the obfuscation to each utf32 character. There is also a mode where the raw string is directly interpreted as utf-16le (no obfuscation) if the obfuscator value is 0 or Decode_Mode is 240 (this value is not handled by PkgText.)

Changing the string decode to work like this should reduce complexity and also make languages like Japanese, Russian, French, Korean, and both forms of Chinese no longer corrupted.