FOLLOW-UP: Add rollback instructions for failed releases

[adnaan]

Context

This follow-up task was identified during the review of PR #122.

Source PR: #122
PR Title: feat: add CLI release workflow and Homebrew support
Suggested by: @claude[bot]

Task Description

Document how to clean up and retry if a release fails. Currently there are no rollback steps documented.

Implementation Options

1. Add rollback steps to release.sh script
2. Create a RELEASING.md document with the full release process including rollback
3. Add comments in the release script with cleanup commands

Rollback Steps to Document

• How to delete a failed tag locally and remotely
• How to delete a draft/failed GitHub release
• How to re-trigger the release workflow
• How to handle partial releases (some artifacts uploaded)

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This issue was automatically created by prmonitor from PR review comments.