First cut of item-with-feed and list impl

- Add strict types to all files
- Convert many queries to document commands

src/public/feed/index.php

@@ -1,4 +1,5 @@
-<?php
+<?php declare(strict_types=1);
+
 /**
  * Add/Edit/Delete Feed Page
  *
@@ -25,7 +26,6 @@ if ($_SERVER['REQUEST_METHOD'] == 'DELETE') {
         Delete::byFields(Table::ITEM, [Field::EQ('feed_id', $feed->id)]);
         Delete::byId(Table::FEED, $feed->id);
         add_info('Feed &ldquo;' . htmlentities($feed->title) . '&rdquo; deleted successfully');
-        $db->close();
         frc_redirect('/feeds');
     } catch (DocumentException $ex) {
         add_error("$ex");