Add hanzo-logo.svg (mono black) and hanzo-logo.png from the logo repo.
npm package READMEs use the PNG via GitHub raw URL so the correct mark
renders on npmjs.com instead of the old every-logo.png.
- Replace EVERY CODE / CODE logo PNGs with Hanzo H logo and HANZO DEV banner
- Fix release.yml version determination to use package.json as authoritative
source instead of chasing highest npm version (was auto-bumping to 3.0.x)
- Rename "Dark - Codex" theme to "Dark - Hanzo" in TUI and theme picker
- Update warning messages from "Codex home" to "config home"
- Handle "hanzo" segment in model name formatting
- Remove "OpenAI Codex" from README highlights