Feat/add openrouter provider

[shehab299]

No description provided.

[Copilot]

Pull request overview

Adds OpenRouter as a first-class provider across the shared auth registry, LLM provider configuration, AI runtime provider implementations, and CLI onboarding/auth flows.

Changes:

• Register a new OpenRouter OAuth/API-key auth provider in libs/shared and expose it through the provider registry.
• Add ProviderConfig::OpenRouter support (config parsing/helpers) and wire OpenRouter into the StakAI adapter/provider registry.
• Add an OpenRouter provider implementation to libs/ai, plus CLI templates/onboarding/auth updates to surface OpenRouter as a built-in provider.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
libs/shared/src/oauth/registry.rs	Registers OpenRouter in the shared OAuth provider registry.
libs/shared/src/oauth/providers/openrouter.rs	Adds shared OAuth “API key” provider for OpenRouter header application/env var.
libs/shared/src/oauth/providers/mod.rs	Exposes the new OpenRouter OAuth provider module.
libs/shared/src/models/stakai_adapter.rs	Wires OpenRouter into inference config + direct provider registry building.
libs/shared/src/models/llm.rs	Adds ProviderConfig::OpenRouter and integrates it into helpers.
libs/ai/src/providers/openrouter/types.rs	Introduces OpenRouterConfig (key/base_url/referer/title).
libs/ai/src/providers/openrouter/provider.rs	Implements OpenRouter generate/stream/model listing using OpenAI-compatible endpoints.
libs/ai/src/providers/openrouter/mod.rs	Declares and exports the OpenRouter provider module.
libs/ai/src/providers/mod.rs	Exposes OpenRouter provider from the AI providers module.
libs/ai/src/client/config.rs	Adds openrouter_config to InferenceConfig and builder helpers.
libs/ai/src/client/builder.rs	Registers OpenRouter provider when configured.
cli/src/onboarding/config_templates.rs	Adds OpenRouter profile template + TOML preview support.
cli/src/onboarding/auth_flow.rs	Adds OpenRouter to onboarding provider selection/defaults/order.
cli/src/config/profile.rs	Cleans OpenRouter endpoints similarly to other providers.
cli/src/config/app.rs	Treats OpenRouter as a built-in provider for auth resolution.
cli/src/commands/auth/login.rs	Enables non-interactive API-key setup for OpenRouter and updates supported list.

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