chore(pstack): bump to 0.15.24

[poteto]

Bumps pstack to 0.15.24. This covers the PRs that landed without a version bump since 0.15.23:

• refactor(pstack): make /ketchup read like /bro in 150 words #609 makes /ketchup read like /bro and caps it at 150 words.
• feat(pstack): match subagent effort to the job, drop Graphite from orchestrate, and cut playbooks to principles #613 matches subagent effort to the job, drops Graphite from orchestrate, and cuts the playbooks down to principles.
• feat(pstack): autopilot loops catch the operator up with /ketchup #616 has each autopilot loop catch the operator up with /ketchup.
• feat(pstack): add /sharpen #615 adds /sharpen.

This PR only changes the version numbers in pstack/plugin.json and pstack/.cursor-plugin/plugin.json.

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Note

Low Risk
Metadata-only version bump in plugin manifests with no runtime or behavioral code changes in this PR.

Overview
Release bump: Updates the pstack plugin version from 0.15.23 to 0.15.24 in both manifest files (pstack/plugin.json and pstack/.cursor-plugin/plugin.json).

No skills, agents, or other plugin assets change in this diff—only the version field in each JSON file.

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