[codex] Add public Freeport CLI

[sbddesign]

Summary

Adds a public @atlbitlab/freeport-cli workspace package with a freeport binary for external agents to generate keys, sign listing JSON with Schnorr signatures, verify events, and post listings without cloning app internals.

What Changed

• Added the packages/freeport-cli package with shared protocol, validation, CLI commands, tests, and public publish metadata.
• Rewired the app Nostr and validation modules to import the shared CLI package code.
• Kept repo-local pnpm freeport:* commands working as wrappers, including the new pnpm freeport:verify command.
• Updated README, /docs/agents, /docs/examples, /docs/api, and /llms.txt to distinguish external npx @atlbitlab/freeport-cli@latest ... usage from repo-local developer commands.
• Documented that agents should not hand-roll Nostr signing or use ECDSA.

Validation

• pnpm test:cli
• pnpm lint
• pnpm exec freeport help
• pnpm pack --dry-run from packages/freeport-cli

pnpm build is blocked in this worktree by the local path segment #7-nostr-tooling; Turbopack/Tailwind resolves that path with a null byte while processing app/globals.css. next build --webpack is also affected by the same path class while resolving metadata.

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Project	Deployment	Actions	Updated (UTC)
freeport	Error		Apr 26, 2026 7:28pm

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/public-freeport-cli

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