[codex] Publish unified Ghost as @anarchitecture/ghost

[nahiyankhan]

🤖 Created by my AI agent.

Summary

This raises the work from the stacked codex/ghost-scan branch back into main after PR #81 merged into the stack instead of the default branch.

• Brings in the unified @anarchitecture/ghost package shape from [codex] Publish unified Ghost as @anarchitecture/ghost #81.
• Replaces the separate public ghost-drift / ghost-scan package surface with one ghost package and bin.
• Folds scan, drift, shared core runtime, and the merged skill bundle into the publishable package so packed artifacts do not depend on workspace-only packages.
• Updates docs, install metadata, release workflows, generated CLI manifest, tests, and changesets for the new public interface.

Why

PR #80 merged codex/ghost-scan into main, then PR #81 merged codex/anarchitecture-ghost into codex/ghost-scan. That left the anarchitecture package work present on the stacked branch but absent from main.

Validation From #81

• pnpm build
• pnpm test — 460 tests passed
• pnpm check
• pnpm dump:cli-help
• pnpm changeset status --verbose — minor bump to @anarchitecture/ghost 0.1.0
• pnpm --filter @anarchitecture/ghost pack --pack-destination /private/tmp/ghost-pack-check-final
• Packed artifact inspection: package name is @anarchitecture/ghost, bin contains only ghost, unified skill bundle is present, and no workspace:*, @ghost/core, ghost-scan, ghost-drift, or @sovereign-design references remain.