Add ability to add query scopes to `LdapImporter` and `ldap:import` command

[stevebauman]

Command Usage:

php artisan ldap:import --scopes="App\Ldap\Scopes\OnlyAccounting"

Importer Usage:

$importer = (new LdapImporter)->setLdapScopes(
    \App\Ldap\Scopes\OnlyAccounting::class,
);