refactor: update user roles and permissions for new role

Signed-off-by: miguel456 <me@nogueira.codes>

database/seeders/PermissionSeeder.php

@@ -42,6 +42,10 @@ class PermissionSeeder extends Seeder
             ]
         );
 
+        $staff = Role::create([
+            'name' => 'staff'
+        ]);
+
         $reviewer = Role::create(
             [
                 'name' => 'reviewer'
@@ -108,15 +112,18 @@ class PermissionSeeder extends Seeder
             'profiles.view.others'
         ]);
 
-        // Able to view applications and vote on them once they reach the right stage, but not approve applications up to said stage
-        $reviewer->givePermissionTo([
-            'applications.view.all',
-            'applications.vote',
+        $staff->givePermissionTo([
             'reviewer.viewAbsence',
             'reviewer.requestAbsence',
             'reviewer.withdrawAbsence',
         ]);
 
+        // Able to view applications and vote on them once they reach the right stage, but not approve applications up to said stage
+        $reviewer->givePermissionTo([
+            'applications.view.all',
+            'applications.vote'
+        ]);
+
         $hiringManager->givePermissionTo('appointments.*', 'applications.*', 'admin.hiring.*');
 
         $admin->givePermissionTo([