feat: add AIML API provider

[D1m7asis]

Introduces full support for AI/ML API as a first-class provider alongside existing ones:

• Configuration

  • Updated README.md to document the new AIMLAPI env var under MODELS
  • Added [MODELS.AIMLAPI] section to sample.config.toml
  • Extended src/app/api/config/route.ts to load and persist aimlApiKey
  • Exposed “AI/ML API Key” input in the Settings UI at src/app/settings/page.tsx
  • Added getAimlApiKey() helper in src/lib/config.ts

• Provider registration

  • New src/lib/providers/aimlapi.ts implements:

    • loadAimlApiChatModels() to fetch and wrap AIMLAPI chat-completion models via LangChain’s ChatOpenAI
    • loadAimlApiEmbeddingModels() to fetch and wrap AIMLAPI embedding models via LangChain’s OpenAIEmbeddings

  • Registered AIMLAPI in the global provider registry at src/lib/providers/index.ts

  • Introduced PROVIDER_INFO for display name and key

All existing workflows for selecting a chat or embedding model now include AIMLAPI as an option, and usage will correctly load your AI/ML API key and surface the available models.

Settings Screenshot:

[ItzCrazyKns]

Thanks!