* Introduce assets/_extracted/VERSION, with text extracted there
* move to `extracted/text/`
* Update gitignore s
* rework args for msgenc.py
* put mkdir with others, until theyre all moved at once
* move 0xFFFC back to being extracted, making it use specific macro `DEFINE_MESSAGE_NES` to handle its special behavior
* prettier gitignore
* Move messages 0xFFFC, 0xFFFD to committed message_data.h
