Retrieve a specific coach by ID:
GET /coaches/{id}
{
"status": "success",
"message": "Coach retrieved successfully",
"data": {
"id": 2,
"coach_no": "C002",
"seat_plan_id": 2,
"coach_type": 2,
"status": "active",
"created_by": 2,
"updated_by": 2,
"created_at": "2021-02-15T12:00:00",
"updated_at": "2021-02-15T12:00:00",
"deleted_at": null
}
}