feat: add loa requests

This commit adds a feature that allows users to request periods of inactivity from their managers. This is effectively known as a leave of absence.

The commit also introduces new permissions and migrations, therefore, you'll need to adapt your database according to these changes.

app/Providers/AuthServiceProvider.php

@@ -21,11 +21,13 @@
 
 namespace App\Providers;
 
+use App\Absence;
 use App\ApiKey;
 use App\Application;
 use App\Appointment;
 use App\Ban;
 use App\Form;
+use App\Policies\AbsencePolicy;
 use App\Policies\ApiKeyPolicy;
 use App\Policies\ApplicationPolicy;
 use App\Policies\AppointmentPolicy;
@@ -64,7 +66,7 @@ class AuthServiceProvider extends ServiceProvider
         Appointment::class => AppointmentPolicy::class,
         Team::class => TeamPolicy::class,
         TeamFile::class => TeamFilePolicy::class,
-        ApiKey::class => ApiKeyPolicy::class
+        Absence::class => AbsencePolicy::class
     ];
 
     /**