Day to day customisation needed for code so making one plugin to reuse in every plugin

My customise code files for wordpress.md

class Customise_WordPress {

  function __construct($name) {
  // Remove the REST API HTML entities.
    $post_type = "post";
    add_filter( 'rest_prepare_ . $post_type', array( $this, 'decode_rest_api_title' ), 20, 3 );
  }
  
  /**
   * Decode HTML entities from the website title.
   *
   * @param string $response Actual response.
   * @param Object    $request Actual request.
   * @param Object    $post actual Post object.
   *
   * @return $response return text with decoded entirties.
   */
  public function decode_rest_api_title( $response, $post, $request ) {
    if ( isset( $post ) ) {
      $decoded_title = html_entity_decode( $response->data['title']['rendered'] );
      $response->data['title']['rendered'] = $decoded_title;
    }
    return $response;
  }
}

https://vanpariyar.in/blog/how-to-remove-html-entities-from-the-rest-api-title-and-content-in-wordpress/