docs: plasma/output integration guide for game and sim integrators

Lamp address map by functional group (keypads have no lamps), 112x32 plasma
model with auto-fit font rules and update semantics, rate-budget guidance,
and recipes: rumble config, DCS Export.lua, SimHub, log tailing, vRIO/vPlasma
bench testing. Cross-linked from FEEDBACK.md (now the wire reference) and
README; corrects the lamp count there (72, per CockpitPanel, not 96).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -23,6 +23,7 @@ Red Planet — talk to the RIO directly and do not use this app.)
 | [`docs/PLAN.md`](docs/PLAN.md) | Full modernization plan |
 | [`docs/PROTOCOL.md`](docs/PROTOCOL.md) | RIO wire format + `iRIO` input-map reference |
 | [`docs/FEEDBACK.md`](docs/FEEDBACK.md) | Game→cockpit feedback endpoint (lamps + plasma over pipe/UDP, rumble) |
+| [`docs/OUTPUT-INTEGRATION.md`](docs/OUTPUT-INTEGRATION.md) | Integrator's guide: lamp address map, plasma display model, per-game recipes |
 | _RIO board hardware & firmware_ | Moved to the [TeslaRel410 `restoration/`](https://gitea.mysticmachines.com/VWE/TeslaRel410/src/branch/main/restoration) archive — board photos, schematics, GAL decode (`restoration/rio-hardware`) and the RIO 4.3 board firmware (`restoration/rio-firmware`) |
 | [`docs/reference/`](docs/reference/) | Cockpit overlay art & the legacy labeling pipeline |
 | [`legacy/`](legacy/) | Original C++/vJoy implementation, kept as reference |