feat(*): refactor dynamic vs. static structure and distinctions; make additional elements dynamic

src/includes/dynamic/fetchers/genre.php.liquid

@@ -0,0 +1,25 @@
+<?php
+
+  require_once __DIR__ . '/../../bootstrap.php';
+
+  use App\Classes\GenreFetcher;
+
+  $requestUri = $_SERVER["REQUEST_URI"];
+  $url = trim(parse_url($requestUri, PHP_URL_PATH), "/");
+
+  if (!preg_match('/^music\/genres\/[\w-]+$/', $url)) redirectTo404();
+
+  $fetcher = new GenreFetcher();
+  $genre = $fetcher->fetch($url);
+
+  if (!$genre) redirectTo404();
+
+  $genre["globals"] = $fetcher->getGlobals();
+  $page = $genre;
+  $globals = $page["globals"];
+
+  extract(setupPageMetadata($page, $requestUri));
+  header("Cache-Control: public, max-age=3600");
+  header("Expires: " . gmdate("D, d M Y H:i:s", time() + 3600) . " GMT");
+
+?>