Strip a surrounding pair of double quotes from the [Plasma] Greeting on
import (the gsheet "INI_V2" output writes Greeting="..."), and add the
master button-layout spreadsheet that documents the RIO.ini format and the
16-bit map-word encoding. Test covers the real sheet output (modifier-stacked
words, keypad VK words, RIO command words) round-tripping verbatim.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
