add SaladCloud AI Gateway provider

[mgorkii-nlplogix]

Summary by cubic

Add saladcloud as an OpenAI-compatible provider to run Qwen 3.5 models via SaladCloud AI Gateway. Includes core provider, GUI presets, and docs with config examples.

• New Features
  • Core: added SaladCloud class (extends OpenAI) with apiBase https://ai.salad.cloud/v1/ and useLegacyCompletionsEndpoint: false; registered in LLMClasses.
  • GUI: new saladcloud provider with API key input and model presets:
    • Qwen 3.5 35B A3B (qwen3.5-35b-a3b, 131,072 context)
    • Qwen 3.5 27B (qwen3.5-27b, 131,072 context)
    • Qwen 3.5 9B (qwen3.5-9b, 131,072 context)
  • Docs: added SaladCloud page with API key link, “Available Models” reference, and YAML/JSON chat model examples; notes embeddings aren’t supported.

^{Written for commit 530ffb4. Summary will update on new commits.}

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[mgorkii-nlplogix]

I have read the CLA Document and I hereby sign the CLA

[cubic-dev-ai]

No issues found across 5 files