Dev: Set timezone for test DB creation, added PHP 8.5 to tests

Also fixed some test namespaces
Related to #5881

tests/Entity/EntityQueryTest.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Entity;
+namespace Tests\Entity;
 
 use BookStack\Entities\Models\Book;
 use Illuminate\Database\Eloquent\Builder;