Move RIO hardware + firmware archive to the TeslaRel410 repo

The physical RIO board docs (photos, schematics, GAL decode) and the
board firmware (dumps, disassembly, make_patch.py, RIO 4.3 + FastRIO
images, analysis, testlogs) describe hardware shared across all Tesla
cockpits with a lifecycle independent of this Windows app — a
native-game-only cabinet runs the firmware and never touches RIOjoy.
They now live in TeslaRel410/restoration/{rio-hardware,rio-firmware}
with full history preserved (git subtree).

Kept here: docs/PROTOCOL.md (this app's interface contract) and the
RioSerialMonitor bench harness (--mash/--e0test, C# on RioJoy.Core).
README + code comments now point at the TeslaRel410 archive.

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

README.md

@@ -22,7 +22,7 @@ Red Planet — talk to the RIO directly and do not use this app.)
 | [`tools/XcfRegionExtract`](tools/XcfRegionExtract/) | Extracts cockpit label regions from `riojoy.xcf` → `regions.json` |
 | [`docs/PLAN.md`](docs/PLAN.md) | Full modernization plan (7 phases) |
 | [`docs/PROTOCOL.md`](docs/PROTOCOL.md) | RIO wire format + `iRIO` input-map reference |
-| [`docs/hardware/`](docs/hardware/) | Board photos, scanned schematics, GAL fuse dump — the physical RIO board set |
+| _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 |