add widget rssread

[Fraenkiman]

Suggestion from @lludvik in #507

example: https://solarcz.eu/programy/php_kody/rssread.php?rss=http://feeds.bbci.co.uk/news/england/rss.xml
source code for rssread.php

<?php
$rss = $_GET['rss'];
$rss = simplexml_load_file($rss);
echo '<h1>'. $rss->channel->title . '</h1>';

foreach ($rss->channel->item as $item) {
   echo '<h2><a href="'. $item->link .'">' . $item->title . "</a></h2>";
   echo "<p>" . $item->pubDate . "</p>";
   echo "<p>" . $item->description . "</p>";
} 
?>

I would be happy for a plugin,would it be possible to enter the RSS feed address in the plugin?