docs: add repository contributor guidelines

wanshenmean

2026-03-17 7a2d709d935075bcdc48e0f3f0ae9f4641663b9f

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{
  "RoadwayCommandMapping": {
    "HC": "Formation",
    "GW": "Standard",
    "CW": "Standard"
  },
  "DefaultCommandType": "Standard"
}