Add tool call & some other params support for llms api

[sammuti]

Add tool call support for llms api

[github-actions]

⚠️WARNING: This PR targets main instead of develop

This PR is targeting main which will trigger a production deployment when merged.

If this is a regular feature/fix PR, please change the base branch to develop.
If this is intentional (e.g., hotfix), you can ignore this warning.

Current base: main
Recommended base: develop

[Copilot]

Pull Request Overview

This PR adds tool call support to the LLMs API, enabling function calling capabilities for both Ollama and Hugging Face Hub inference routers.

• Extended the complete_chat method to accept additional parameters via **kwargs including tool definitions
• Modified return types to support both string responses and full response objects when tools are involved
• Updated both Ollama and Hugging Face Hub implementations to handle tool calls and return appropriate response formats

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[bradhe]

Looks good, let's ship it.