Summary of PR

This PR includes a custom visualizer just for the CLI. This is largely the same as before except that the system prompt event is no longer emitted. Going forward we'd update the visualizer class in order to make any major changes to the CLI UI.

Change Type

• Bug fix
• [] New feature
• Breaking change
• Refactor
• Other (dependency update, docs, typo fixes, etc.)

Checklist

• I have read and reviewed the code and I understand what the code is doing.
• I have tested the code to the best of my ability and ensured it works as expected.

Fixes

Resolves #(issue)

Release Notes

• Include this change in the Release Notes.

To run this PR locally, use the following command:

GUI with Docker:

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.openhands.dev/openhands/runtime:7a4f893-nikolaik   --name openhands-app-7a4f893   docker.openhands.dev/openhands/openhands:7a4f893

CLI with uvx:

uvx --python 3.12 --from git+https://github.com/OpenHands/OpenHands@cli-visualizer#subdirectory=openhands-cli openhands