Adds Coordinator Mode v0.3

[SetraTheXX]

Summary

Adds Coordinator Mode v0.3 helper commands for safer manual multi-agent workflows.

This keeps Coordinator Mode manual-helper only. It does not spawn Codex processes, automate terminals, auto-merge, auto-push, publish releases, or run autonomous agents.

Added

• --run <id> support for selecting a specific Coordinator Mode run
• cewp run worktrees plan
• cewp run worktrees create
• cewp run worktrees status
• cewp run collect
• cewp run finalize
• cewp run cleanup

Workflow

The new helper flow is:

run init
-> worktrees plan
-> worktrees create
-> worktrees status
-> collect
-> finalize
-> cleanup

Safety

• Worktree creation blocks dirty main repos and unsafe target paths.
• Worktree status reports clean/dirty state and allowed/forbidden file warnings.
• Collect generates a local review packet under .cewp/runs/<run-id>/review-packets/.
• Finalize requires reviewer Decision: PASS.
• Cleanup is dry-run by default.
• Cleanup only removes clean registered worktrees with --yes.
• Dirty worktrees are preserved.
• .cewp/runs/<run-id>/ history is preserved.
• No merge, push, publish, Codex process spawn, codex exec, or terminal automation is added.

Verification

• node --check ./bin/cewp.js
• node ./bin/cewp.js --help
• node ./bin/cewp.js doctor
• node ./bin/cewp.js list
• Full temp-repo Coordinator Mode workflow smoke test
• Negative/safety tests for invalid --run, unsafe paths, dirty repos, missing reviewer PASS, and dirty cleanup
• npm pack --dry-run

Notes

bin/cewp.js has grown significantly during v0.3. This is not a blocker for this PR, but a follow-up modular refactor branch is recommended after merge.

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