Both 'hermes model' and 'hermes setup model' now present a clear
two-option auth flow when no credentials are found:
1. Claude Pro/Max subscription (setup-token)
- Step-by-step instructions to run 'claude setup-token'
- User pastes the resulting sk-ant-oat01-... token
2. Anthropic API key (pay-per-token)
- Link to console.anthropic.com/settings/keys
- User pastes sk-ant-api03-... key
Also handles:
- Auto-detection of existing Claude Code creds (~/.claude/.credentials.json)
- Existing credentials shown with option to update
- Consistent UX between 'hermes model' and 'hermes setup model'