Move files, complete PHP migration

The application works the same way as the F# version

src/public/components/request/add-note.php

@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-use MyPrayerJournal\{Auth, Layout, Request};
+use MyPrayerJournal\UI\Layout;
 
 require '../../../start.php';