feat(frontend): replace lazy loading with zibll lazysizes

inc/helpers/posts-renderer/config.php

@@ -342,30 +342,6 @@ if (!function_exists('aksrt_renderer_resolve_images')) {
 	}
 }
 
-if (!function_exists('aksrt_renderer_lazyload_config')) {
-	/**
-	 * Small lazyload config subset for post cards.
-	 *
-	 * @return array<string,mixed>
-	 */
-	function aksrt_renderer_lazyload_config(): array {
-		if (class_exists('\AKSRT\Settings\Settings')) {
-			$lazy = \AKSRT\Settings\Settings::get_lazyload_config();
-			return [
-				'enabled'         => !empty($lazy['enabled']) && !empty($lazy['posts_thumb_enabled']),
-				'placeholder_url' => (string) ($lazy['placeholder_url'] ?? ''),
-				'blur'            => !empty($lazy['blur']),
-			];
-		}
-
-		return [
-			'enabled'         => false,
-			'placeholder_url' => '',
-			'blur'            => false,
-		];
-	}
-}
-
 if (!function_exists('aksrt_renderer_thumb_ratio_value')) {
 	/**
 	 * Convert ratio tokens like 4:3 to CSS aspect ratio values.