refactor model to support aliases

[pelikhan]

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High Level Summary of Changes

• Refactoring Model Aliases:

  • Introducing a new modelAliases object to manage model configurations. This simplifies accessing different models by name.

• Renaming and Deprecating Small and Vision Model Properties:

  • Deprecated the use of smallModel and visionModel properties in the ModelConnectionOptions. Developers are encouraged to use the new model alias system instead.

• Updating Configuration Access:

  • Replaced direct access to default models like runtimeHost.defaultEmbeddingsModelOptions.embeddingsModel with equivalent access via the modelAliases object, ensuring a more consistent and intuitive API.

• Consolidated Default Model Management:

  • Merged previous default model configurations into a single modelAliases object for simplicity and easier management.

• Simplifying VectorSearch Configuration:

  • Used the new model alias system to access the embeddings model in vectorSearch, aligning with the updated configuration structure.

generated by pr-describe

[github-actions]

LGTM 🚀

The refactoring and consolidation of model configuration options in these files look good. The removal of deprecated fields and the centralization of model aliases in the Host interface is a step towards cleaner and more maintainable code.

The TypeScript compiler will handle any type-related issues, so there's no need to worry about that aspect. The changes are focused on improving structural integrity and reducing redundancy, which should lead to fewer bugs and easier maintenance moving forward.

If there were any functional concerns or potential areas for improvement, I would have mentioned them. Since none were identified, the changes look solid and ready to be merged.

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Copilot reviewed 22 out of 22 changed files in this pull request and generated no suggestions.