Integrate MLX Swift for on-device ML computation

Library: MLX Swift

URL: https://github.com/ml-explore/mlx-swift

Role: Swift API/binding to Apple's MLX framework

Purpose: Enables on-device ML computation & LLM/VLM inference on Apple hardware.

Notes:

MLX Swift is active with examples (mlx-swift-examples)
Apple's MLX is positioned as a research/system framework
Caution: MLX is intended for research and not for production deployment of models in apps

Priority: High - Core ML inference capability

References: