Human-facing reference documentation, split from AGENTS.md's agent-facing
domain rules and bug history (which stays there, not duplicated here):
- docs/architecture.md: layer diagram, module responsibilities, config
storage location, the three GUI modes, and the port-exclusivity /
multi-process caveats around concurrent access
- docs/data-model.md: the combined and legacy JSON formats, the binary
SDeviceConfig/SDeviceProfile/SMacroTable NVM layout byte-for-byte, action
types, LED fields, macro-slot conventions, button grid geometry
- docs/protocol.md: the 8-byte serial packet format, command/event tables,
the read/write/status-poll flows, connection lifecycle, and error states
README.md now links to all three from a new "Dokumentation" section, and
AGENTS.md's outdated "docs/ tree isn't warranted yet" note is removed now
that it exists on explicit user request.
