Add `wasmJs` target for `kotlin-browser`

Open problems:
* No common `definedExternally`

Required `expected` types:
* `JsAny`
* `JsBoolean`
* `JsNumber`
* `JsString`
* `JsArray`
* `JsError`

Check:
* `ReadonlyArray`
* `JsLong`

Kotlin issue - TBD

[Related discussion](https://kotlinlang.slack.com/archives/C0B8L3U69/p1724961976083689)