autodetect js module type - only bundle esm (#5515)

* wip: autodetect esm

* finish fixes

* thread minify through

* add sweetalert2

* Fix default bundle types

* ts-ignore

* small nits

* small more nits

* shrink flamegraph

packages/playwright-tests/cli-optimization/assets/cjs_classic.cjs

@@ -0,0 +1,6 @@
+(function () {
+    var module = { exports: {} };
+    var exports = module.exports;
+    exports.value = "ok-cjs";
+    window.__cjs_classic_value = module.exports.value;
+})();