Como dev, quiero crear modelo, migración y validación de "principals", para poder almacenar directivos

[MaksiConGit]

Los campos requeridos:

• [x] id()
• [x] string('name') => 'required|string|min:2|max:255'
• [x] string('lastname') => 'required|string|min:2|max:255'
• [x] string('dni') => 'required|string|max:255|unique'
• [x] string('phone') => 'required|string|max:14'
• [x] date('birthdate') => 'required|date|before:today'
• [x] foreignId('city_id') -> constrained() -> onUpdate('cascade') -> onDelete('restrict') => 'required|exists:cities,id'
• [x] foreignId('user_id') -> constrained() -> onUpdate('cascade') -> onDelete('restrict') => 'required|exists:users,id'
• [x] boolean('is_deleted')->default(false) => 'boolean'
• [x] timestamp()

[MaksiConGit]

Falta agregar la validación unique al DNI.