feat(agent): add BrowseURLAction back (produce markdown from URL)

[xingyaoww]

End-user friendly description of the problem this fixes or functionality that this introduces

• Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

---

Give a summary of what the PR does, explaining any non-trivial design decisions

Add a microagent that would allow the agent to read webpage, and convert it to markdown file.
Screenshot of it working:

---

Link of any specific issues this addresses

---

To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:87f5e9a-nikolaik   --name openhands-app-87f5e9a   docker.all-hands.dev/all-hands-ai/openhands:87f5e9a

[neubig]

Can we evaluate this in some way? WebArena would be ideal, but barring that miniwob

[xingyaoww]

@neubig this will ONLY be triggered when "https://" or "https://" keywords are detected from user messages -- which a lot of instances (if not all) in miniwob/webarena do not have, means these benchmark likely won't be able to evaluate this changes?

[neubig]

I think miniwob and webarena tell you the URL to go to? (but if not, maybe they should...)