docs: add early access Typescript note

[danstarns]

We released early access to our Typescript integration last week and would like to capture some traffic and early adopters before a more solidified documentation change.

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[atovpeko]

Closing this PR because it does not look relevant anymore. If it is, please open a new one.