Adds chess analysis page

Adds a new page for chess analysis, powered by lichess.org,
and integrates it into the navigation menu. Also adds daily
puzzle snippet to home page. Updates hero image to correct gif.

site/templates/analyse.php

@@ -0,0 +1,5 @@
+<?php snippet('layout', slots: true) ?>
+
+    <?php snippet('analyse') ?>
+
+<?php endsnippet() ?>

site/templates/home.php

@@ -1,16 +1,15 @@
-<?php snippet('layout', slots: true) ?>
+<?php snippet('layout', slots: true); ?>
 
     <h1>Herzlich Willkommen!</h1>
 
     <?= $page->text()->kirbytext() ?>
 
     <?php snippet('home-news', [
-        'news' => page('news')
-        ->children()
-        ->limit(3)
-        ->sortBy('date', 'desc')
-    ]) ?>
+      'news' => page('news')->children()->limit(3)->sortBy('date', 'desc'),
+    ]); ?>
 
-    <?php snippet('home-termine') ?>
+    <?php snippet('home-termine'); ?>
 
-<?php endsnippet() ?>
+    <?php snippet('puzzle'); ?>
+
+<?php endsnippet(); ?>