Feature/add hpc ai provider

[lioZ129]

Description: (required)

• Add native provider hpc-ai with OpenAI-compatible chat completions: default base URL https://api.hpc-ai.com/inference/v1, Authorization: Bearer, endpoints /chat/completions (non-stream + stream), response transforms for OpenAI-style errors, optional FastAPI-style detail errors, and provider tagging on success/stream chunks.
• Support optional Node overrides: custom_host / x-portkey-custom-host, and env HPC_AI_BASE_URL after customHost; document HPC_AI_API_KEY / HPC_AI_BASE_URL in .env.example and integration test vars in testVariables.ts.
• Register HPC_AI in VALID_PROVIDERS; add models minimax/minimax-m2.5 and moonshotai/kimi-k2.5 to models.json under provider hpc-ai.
• Update local Gateway Console (public/index.html): provider option, modelMap / docsMap for HPC-AI.
• README / Japanese README table: HPC-AI row with link to https://www.hpc-ai.com/ and logo https://company.hpc-ai.com/hubfs/logos/colossal-ai_logo_vertical.svg.

Tests Run/Test cases added: (required)

• npm run build — passed
• npm run format:check — passed
• No new automated test cases added (existing npm run test:gateway has pre-existing failures unrelated to this change in this environment)

Type of Change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

[Copilot]

Pull request overview

Adds a new native hpc-ai provider to the Gateway with OpenAI-compatible /chat/completions support, wiring it through provider registration, model catalog, local console UI, and documentation.

Changes:

• Implement hpc-ai provider configuration (base URL, auth header, endpoint mapping, response + stream chunk transforms).
• Register hpc-ai across the gateway (providers index, VALID_PROVIDERS), add HPC-AI models to models.json, and add integration-test variables.
• Update local Gateway Console UI and docs (README + JP README) to expose/select HPC-AI.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/tests/resources/testVariables.ts	Adds hpc-ai env var hook-up for integration tests.
src/public/index.html	Adds HPC-AI to provider dropdown plus model/docs maps in the local console.
src/providers/index.ts	Registers the new hpc-ai provider config.
src/providers/hpc-ai/index.ts	New provider entry-point wiring API + transforms.
src/providers/hpc-ai/chatComplete.ts	New chat completion request config and response/stream transforms with provider tagging.
src/providers/hpc-ai/api.ts	New base URL resolution (customHost/env/default), auth header, and endpoint mapping.
src/globals.ts	Adds HPC_AI constant and registers it in VALID_PROVIDERS.
src/data/models.json	Adds two HPC-AI models to the global model list.
README.md	Adds HPC-AI to supported providers and documents usage/overrides.
.github/README.jp.md	Adds HPC-AI to the Japanese supported providers table.

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[lioZ129]

@narengogi could you please review this & docs?