feat: add Codex CLI customization scripts (#336)
* chore(codex): add global ecc sync script and pnpm mcp config
* chore(codex): include codex supplement when syncing agents
* feat(codex): add global git safety hooks and QA/rule prompt packs
* feat(codex): add global regression sanity check command
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Co-authored-by: TGreen87 <your-email@example.com>
Tom Green