Feature Request: support MLX provider from Conduit

[zallsold-lgtm]

Hi @christopherkarani , thanks for all the hard works on this package. When trying to build a demo using swarm, I failed to find a way to enable MLX provider.

• Since Conduit is a dependency of swarm, and there seems to be no traits in Package.swift from Swarm side, how can I enable MLX traits for conduit when I use swarm?
• It seems that Sources/Swarm/Providers/Conduit/LLM.swift expose some handy static method for creating openAI/anthropic/openRouter/minimax/ollama providers but mlx is missing

[christopherkarani]

on it, I appreciate you finding this bug @zallsold-lgtm