fix: remove object type hints from Loader to support string class names

The add_action(), add_filter(), and add() methods used `object` type
hints for the $component parameter, but several hooks pass string class
names (for static method callbacks). PHP 8.3 strict typing rejects
strings where `object` is declared, causing a fatal TypeError that
crashes the entire site.

Removed the `object` type hint to accept both object instances and
string class names, which is required for WordPress static callbacks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

includes/class-peptide-news-loader.php

@@ -51,7 +51,7 @@ class Peptide_News_Loader {
 	 * @param int    $priority      Optional. The priority at which the function should be fired. Default is 10.
 	 * @param int    $accepted_args Optional. The number of arguments that should be passed to the $callback. Default is 1.
 	 */
-	public function add_action( string $hook, object $component, string $callback, int $priority = 10, int $accepted_args = 1 ): void {
+	public function add_action( string $hook, $component, string $callback, int $priority = 10, int $accepted_args = 1 ): void {
 		$this->actions = $this->add( $this->actions, $hook, $component, $callback, $priority, $accepted_args );
 	}
 
@@ -65,7 +65,7 @@ class Peptide_News_Loader {
 	 * @param int    $priority      Optional. The priority at which the function should be fired. Default is 10.
 	 * @param int    $accepted_args Optional. The number of arguments that should be passed to the $callback. Default is 1.
 	 */
-	public function add_filter( string $hook, object $component, string $callback, int $priority = 10, int $accepted_args = 1 ): void {
+	public function add_filter( string $hook, $component, string $callback, int $priority = 10, int $accepted_args = 1 ): void {
 		$this->filters = $this->add( $this->filters, $hook, $component, $callback, $priority, $accepted_args );
 	}
 
@@ -82,7 +82,7 @@ class Peptide_News_Loader {
 	 * @param  int    $accepted_args The number of arguments that should be passed to the $callback.
 	 * @return array  The collection of actions and filters registered with WordPress.
 	 */
-	private function add( array $hooks, string $hook, object $component, string $callback, int $priority, int $accepted_args ): array {
+	private function add( array $hooks, string $hook, $component, string $callback, int $priority, int $accepted_args ): array {
 		$hooks[] = array(
 			'hook'          => $hook,
 			'component'     => $component,