[PP-1] change from the global configuration object to the data-skipto approach

i've managed to get a more drupal like approach working locally. i've added two small snippets to the skipto.js file that enable pagescript 5 to basically use drupalSettings. i am not sure if it would make much sense to add that snippet upstream cuz strictly speaking the easiest and preferable approach for folks wanting to use skipto would be using the skipto module. but maybe i can open an issue and simply ask the maintainer. would be the most convenient if it would get added but still also not biggie to add it every new skipto asset release? but that approach is definitely the cleanest and saves more module code.