Add utf16 to utf8, Add usage example

[robertlzj]

utf16_to_utf8 used in stringdecode.decode

[KOLANICH]

I guess it should use the package, not inline the source.

[robertlzj]

Could wrap inline source to single function, although the code is a little long.
But since it's not reuse anywhere, and as private function, could just keep in line source for easier file organize.
Both OK.

[KOLANICH]

I meant a LuaRocks package.

[robertlzj]

Oh, sorry, not familiar with generating LuaRocks.
And you mean package of patch?

[KOLANICH]

I mean your patch mentions the code had been taken from https://github.com/robertlzj/lua_utf16_to_utf8 . Maybe we shouldn't inline the code, but make https://github.com/robertlzj/lua_utf16_to_utf8 a LuaRocks package and just import it?

[robertlzj]

Haha, lua_utf16_to_utf8 is my fork from another source, only adjust to match kaitai lua.
I would like to avoid to package it, for I'm not the designer, and can't do further update.
Whatever that is convenient for you~

[generalmimon]

Honestly, don't hold your breath until this pull request is merged. I can already see that there are several issues that will have to be solved, I'll have to make a significant effort to get this ready and it's not the top priority for me at the moment, sorry.

[robertlzj]

Haha, OK, I'm fine. Glad to push any progress.
Great project, honestly 👍