Update deps and refresh media library UI

Bump multiple JS dependencies in package-lock.json (Tailwind packages, @parcel/watcher, @jridgewell/*, sourcemap tools, etc.), add license metadata and update optional/engine fields where applicable. Rebuilds/compiled CSS updated for the media library (resources/css/components/media-library.css and corresponding files in resources/dist) and update tree-node stylesheet. Small change to MediaPicker PHP component (src/MediaLibrary/Forms/Components/MediaPicker.php) to accompany the UI/style updates.

Author: cklei-carly