feat: add schema.org json-ld objects to podcasts, episodes, posts and comments pages

- refactor meta-tags by generating them in the controller and injecting them into the views
- use
`melbahja/seo` library to build opengraph and twitter meta-tags + schema.org objects

app/Controllers/BaseController.php

@@ -28,7 +28,7 @@ class BaseController extends Controller
         ResponseInterface $response,
         LoggerInterface $logger
     ): void {
-        $this->helpers = array_merge($this->helpers, ['auth', 'svg', 'components', 'misc']);
+        $this->helpers = array_merge($this->helpers, ['auth', 'svg', 'components', 'misc', 'seo']);
 
         // Do Not Edit This Line
         parent::initController($request, $response, $logger);