[codex] Add network-effective triage view

[TacoRocket]

Summary

• add the network-effective command and output/schema/golden coverage
• tighten cross-platform README, release, and wiki-seed guidance
• move repo-internal planning docs out of the repo docs tree

Validation

• python3 -m ruff check src tests scripts
• PYTHONPATH=src python3 -m pytest tests/test_collectors.py tests/test_golden_outputs.py tests/test_contract_schemas.py tests/test_cli_smoke.py tests/test_help.py tests/test_terminal_ux.py tests/test_models.py -q
• PYTHONPATH=src git push -u origin docs/cross-platform-ux