Add a named 'orcarouter' preset to the shared provider catalog mirroring
the existing OpenRouter entry: OpenAI-compatible base URL
https://api.orcarouter.ai/v1, default model openai/gpt-5.5, sk-orca-...
key placeholder, and a dashboard icon. Regenerate the throw-error
baseline for the line shift in provider-preset-catalog.ts.
Co-Authored-By: Claude <noreply@anthropic.com>
