docs(javascript): add module exports and experimental metadata (#71238)
## 📚Improving Documentation
Hello, I've added `module.exports` and `version: experimental` metadata.
Since the configuration uses `experimental` key, I believe it's
necessary to include `version: experimental` in the metadata.
Additionally, in other parts of the documentation, `module.exports` is
always present like the screenshot below.

Co-authored-by: JJ Kasper <jj@jjsweb.site>