Refine Ghost docs IA and copy

[nahiyankhan]

🤖 Created by my AI agent.

Summary

• Clarifies the root README and docs opening around repo-local fingerprint.md.
• Makes Start / Getting Started own the Ghost loop instead of surfacing Workflow as a standalone destination.
• Simplifies Tools into a true tool directory and redirects map/workflow legacy paths to the right places.

Verification

• pnpm check
• pnpm test
• pnpm --filter ghost-docs build

Pre-push also ran pnpm build, pnpm check, and pnpm test successfully.