switch to playwright test runner, use esbuild for dev builds, switch to array destructuring

config/playwright/rollup.pluginAdditionalWatchFiles.js

@@ -0,0 +1,13 @@
+const fs = require('fs');
+
+module.exports = (files) => ({
+  buildStart() {
+    if (files) {
+      files.forEach((file) => {
+        if (fs.existsSync(file)) {
+          this.addWatchFile(file);
+        }
+      });
+    }
+  },
+});