docs: add Superserve sandbox integration

[Mohamed Sobhy (mohamedsobhi777)]

Overview

Adds documentation for langchain-superserve, a Superserve sandbox backend for Deep Agents. The package is published to PyPI and implements the Deep Agents SandboxBackendProtocol (subclassing BaseSandbox), plus a dcode sandbox provider for Deep Agents Code.

This is a documentation-only PR for an independently published package, per the contributing guide. Superserve authors and maintains this integration.

Changes:

• New page: src/oss/python/integrations/sandboxes/superserve.mdx
• Listing card on src/oss/python/integrations/sandboxes/index.mdx
• Brand icons: src/images/providers/{light,dark}/superserve.svg

Type of change

Type: New documentation page

Related issues/PRs

• GitHub issue:
• Feature PR:

Checklist

• I have read the contributing guidelines, including the language policy
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed (not needed — individual sandbox pages are surfaced via the index card grid, matching the other sandbox pages)

[github-actions]

Thanks for opening a docs PR, Mohamed Sobhy (@mohamedsobhi777)! When it's ready for review, please add the relevant reviewers:

• @mdrxy (Python integrations)

[langchain-automated-triage]

Thanks for contributing a new integration docs page, Mohamed Sobhy (@mohamedsobhi777)!

We receive a large number of PRs and review them as quickly as we can. Please bear with us as we work through the queue.

If you have already tagged a maintainer on this PR, do not tag them again.

[Mohamed Sobhy (mohamedsobhi777)]

Mason Daugherty (@mdrxy) this is ready for review when you have a chance.

Docs-only PR adding the Superserve sandbox integration page. langchain-superserve is published to PyPI, which meets the third-party sandbox featuring criterion.
All CI checks pass, and I verified locally with docs dev that the page (sections, code groups, <Note> callout) and the Superserve card in the sandboxes index both render correctly. Thanks!