Release 1.5.0

[mamoodi]

• 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

Doc updates for Release 1.5.0

[all-hands-bot]

🟡 Acceptable - Mechanically correct version bump, but timing is critical.

[CRITICAL ISSUES]
The openhands:1.5 Docker image does not exist yet. Merging this before the image is published will break every user who runs these commands.

[TESTING GAPS]
No evidence section in the PR description. For a release PR that changes user-facing commands, you should prove the commands work.

VERDICT:
⚠️ Conditionally approve: Only merge this AFTER the docker.openhands.dev/openhands/openhands:1.5 image is published and available.

KEY INSIGHT:
Release PRs are time bombs - "Never Break Userspace" means merge timing matters as much as correctness. Verify images exist before merging docs that reference them.

[enyst]

Thank you!