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/mjs_auto.mjs

@@ -0,0 +1 @@
+window.__mjs_auto_value = typeof import.meta.url === "string" ? "ok-mjs" : "bad-mjs";