* add Vercel and OpenRouter as OpenAI-compatible LLM providers
* fix(fmt): fix cargo fmt line length issues in provider id tests
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* style(hermesllm): fix rustfmt formatting in provider id tests
* Add Vercel and OpenRouter to zero-config planoai up defaults
Wires `vercel/*` and `openrouter/*` into the synthesized default config so
`planoai up` with no user config exposes both providers out of the box
(env-keyed via AI_GATEWAY_API_KEY / OPENROUTER_API_KEY, pass-through
otherwise). Registers both in SUPPORTED_PROVIDERS_WITHOUT_BASE_URL so
wildcard model entries validate without an explicit provider_interface.
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Co-authored-by: Musa Malik <musam@uw.edu>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
