Refresh player with native block editor preview and local assets

Preserve shortcode rendering, normalize options, bundle the player locally,
and add reproducible packaging and WordPress integration tests.

webpack.config.cjs

@@ -0,0 +1,7 @@
+const path = require('path');
+const config = require('@wordpress/scripts/config/webpack.config');
+module.exports = {
+  ...config,
+  entry: { index: path.resolve(__dirname, 'src/index.js'), view: path.resolve(__dirname, 'src/view.js') },
+  output: { ...config.output, path: path.resolve(__dirname, 'build') },
+};