docs: add uninstall instructions to README

[dastratakos]

Summary

Add an Uninstall section to the README so users know how to cleanly remove Stage. The steps mirror the install flow in reverse order.

Changes

• Added "Uninstall" section between Install and Usage with commands to remove the agent skill and uninstall the global npm package

Testing

Verified README renders correctly with the new section.

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Summary by cubic

Added an Uninstall section to the README with clear steps to remove Stage. Includes commands to remove the ReviewStage/stage-cli skill and uninstall the global stagereview package.

^{Written for commit 0b6a750. Summary will update on new commits. Review in cubic}

[stage-review]

Ready to review this PR? Stage has broken it down into 1 individual chapter for you:

	Title
1	Add uninstall instructions to README

_{Chapters generated by Stage for commit 0b6a750 on May 27, 2026 7:15pm UTC.}

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Remove the installed skill name

For users following these uninstall docs, this command passes the repository source rather than the installed skill name. I checked the skills CLI docs for remove, which describe removing by skill name (for example, npx skills remove web-design-guidelines), and this repo’s skill frontmatter names the installed skill stage-chapters in skills/stage-chapters/SKILL.md; as written, the skill can remain installed after the npm package is removed.

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