Move files, complete PHP migration

The application works the same way as the F# version

src/public/request/full.php

@@ -1,6 +1,7 @@
 <?php declare(strict_types=1);
 
-use MyPrayerJournal\{History, Layout, Note, RequestAction, UI};
+use MyPrayerJournal\Domain\{History, Note, RequestAction};
+use MyPrayerJournal\UI\{Layout, RelativeDate};
 
 require '../../start.php';
 
@@ -27,7 +28,7 @@ Layout::pageHead('Full Request');?>
             <h6 class="card-subtitle text-muted mb-2"><?php
                 if (!is_null($answered)) { ?>
                     Answered <?=$answered->format('F j, Y')?>
-                    (<?=UI::formatDistance('now', $req->history[0]->asOf);?>) &bull;<?php
+                    (<?= RelativeDate::between('now', $req->history[0]->asOf);?>) &bull;<?php
                 } ?>
                 Prayed <?=number_format($prayed)?> times &bull; Open <?=number_format($daysOpen)?> days
             </h6>