add Spatie\Permission roles, seeder and changes README.md

app/Models/User.php

@@ -7,10 +7,13 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 
+use Spatie\Permission\Traits\HasRoles;
+
 class User extends Authenticatable
 {
     /** @use HasFactory<\Database\Factories\UserFactory> */
     use HasFactory, Notifiable;
+    use HasRoles;
 
     /**
      * The attributes that are mass assignable.