[codex] replace character names and assets

[beefiker]

What changed

• Replaced the public and coded crew names with the new owned names: fronk, zyro, usk, jumbo, rovyn, nomi, and loopi.
• Replaced the old README and web image assets with the selected generated assets.
• Updated runtime code, hooks, docs, locales, tests, and the static web page references so the repo no longer points at the old character names/assets.
• Updated the enforced file inventories for the new asset set.

Why

This reduces obvious copyrighted/trademarked character surface in Superloopy's public docs, bundled agents, and web demo assets while preserving the existing behavior and evidence gates.

Validation

• node --test test/audit.test.js test/docs.test.js test/plugin.test.js test/doctor.test.js
• npm test (245/245 passing)
• node src/cli.js doctor --json (ok: true)
• Stale-reference scan for old names/assets and related phrases returned no matches.