RetroConsole

* **Console chassis styles** — 5 silhouettes × 3 tones × 3 states * **Screen shells** — 5 designs with front/back mounts and dye tones, applied wall-wide * **Gamepad item** — 3 shells × 3 tones * **Crash fix** — deferred screen rebuild removes a `StackOverflowError` when rebuilding before the block entity was published * **Screen geometry cache hardening** + mkxp-z/libretro environment handling