v1.0.1 — GP3 JIP distance-mipmap fix

Bugfix release.

Fixes

• GP3 JIP distance mipmaps — fixed the dark blotches on far/distance mip
  levels. The JIP mip strip is now built as a true power-of-two pyramid
  (matching the real GP3 gamejips layout) and restricted to the colours the
  source textures actually use, so blurred edge pixels no longer land on
  palette indices that GP3 shades dark. Mips are also regenerated on save, so a
  saved .JIP can never ship a stale strip. Verified in-game.

Housekeeping

• Removed the machine-specific palette-detection cache (jam_palettes.json)
  from the repository — the app regenerates it at runtime.

Still experimental / unchanged

• RCR (car) JAMs remain view / render-only; a dedicated Car Editor is planned.

Full changelog: v1.0...v1.0.1