feat(cua): add hyperbrowser provider for cua agent

[NikhilShahi]

This PR adds Hyperbrowser as an optional provider for using with LangGraph and CUA. It uses Hyperbrowser browser session and playwright to allow CUA to interact with the browser page. Scrapybara is kept as the default provider.

[benjamincburns]

Hi @NikhilShahi - thanks for the contribution!

It's great to offer freedom of choice for underlying components like this. However my concern with this specific change would be that it forces the user to install dependencies for all providers rather than installing only the packages that they need to support their desired configuration. This sort of extensibility may be something that @bracesproul has already considered, so I'm afraid that I'll need to defer to him on this.

In the meantime, if you can turn this PR into one that allows the user to bring any arbitrary provider without further modification to the code, that would be much easier to accept.

[bracesproul]

some feedback, very good start. thanks for putting this PR up!

[NikhilShahi]

Hey @bracesproul , thanks for the feedback. I think I have implemented the changes requested, let me know if there is anything else I should change.