Resource Pack Overrides config field names extracted directly from the
mod's class files (default_packs + default_overrides confirmed via grep
on the .class strings). Config ships through defaultconfigs/ so it
seeds the player's local config on first run and respects later edits.
The 'default_position: TOP' override puts the ReCreated pack at the top
of the enabled-packs list so it takes precedence over the vanilla
ComputerCraft textures.
If the filename or schema turns out to be off when tested, it's a
one-line follow-up to fix.
Matt