feat: add native code block feature with Prism highlighting and editor integration

- Implemented custom code block system for frontend and editors
- Integrated Prism.js for syntax highlighting (YAML + HTML support)
- Added copy-to-clipboard functionality with hover-based UI
- Introduced custom Gutenberg block for code input
- Added Classic Editor button for quick code insertion
- Implemented server-side rendering via the_content filter
- Added dedicated styling (code.css) with Dracula-inspired theme
- Added editor preview styling (editor.css) for visual consistency
- Ensured accessibility and keyboard support for copy button
- Optimized asset loading and versioning using filemtime()

This feature provides a lightweight, theme-native alternative to external code highlighting plugins.

inc/utilities/helpers.php

@@ -224,3 +224,11 @@ if ( ! function_exists( 'zeitfresser_asset' ) ) {
         return get_template_directory_uri() . '/assets/' . ltrim($path, '/');
     }
 }
+
+/**
+ * Delete Cookie Button
+ */
+ add_filter( 'comment_form_default_fields', function( $fields ) {
+    unset( $fields['cookies'] );
+    return $fields;
+});