MODELO DE DATOS DE HORARIOS:

- formato horario:

TIMETABLE: {
  "createdOn" : ISODATE: YYYY-MM-DD,
  "teachers": $ref[]: 'ref1,ref2,ref3',
  "checkpoints": $ref[],
  "duration" : 30 | 45 | 60,
  "end" : string: HH:MM,
  "start" : string: HH:MM,
  "name" : string,
  "planning" : {
    [key: "Monday" | "Thursday" ...] : {
      [key: string: HH:MM] : {
        "end" : string: HH:MM,
        "price" : 20,
        "start" : string: HH:MM,
        "teacher" : $ref
        "checkpoint" : $ref
      },
      n: n
    }
  }
}

- guardar horario

/data/schools/VVpI4e7CSTe8Kg4bGkejgiFojB33/timetables/$tid

{ ...TIMETABLE }

- asignar horario - coche

- panel

/data/schools/VVpI4e7CSTe8Kg4bGkejgiFojB33/timetables/$tid/cars

{
  [key: ISODATE: YYYY-MM-DD]: $plate,
  n: n,
}

- back (readonly)

/data/schools/VVpI4e7CSTe8Kg4bGkejgiFojB33/cars/$plate/timetables

{
  [key: ISODATE: YYYY-MM-DD]: { ...TIMETABLE },
  n: n,
}