docs: add Agent Canvas 1.24.0 release notes

[DevinVinson]

• I have read and reviewed the documentation changes to the best of my ability.
• If the change is significant, I have run the documentation site locally and confirmed it renders as expected.

Summary of changes

• Add the Agent Canvas 1.24.0 release-notes page, based on the official OpenHands v1.24.0 release.
• Add the page as the newest entry in the Agent Canvas Release Notes navigation group.
• Include the official release date, release and compare links, user-facing highlights and fixes, and maintenance updates.

Validation

• python3 -m json.tool docs.json >/dev/null
• Verified the referenced internal documentation targets exist.
• git diff --check

The documentation site was not run locally because this prose-only change did not require installing the Mintlify toolchain.

This pull request was created by an AI agent (OpenHands) on behalf of the user.

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated
all-hands-ai	🟢 Ready	View Preview	Oct 1, 2026, 12:50 PM

💡 Tip: Enable Automations to automatically generate PRs for you.