[FEAT] Add NPU Engine

[szeyu]

Is your feature request related to a problem? Please describe.

Intel has its own npu runtime library
Reference : Phi-3 Cookbook - Intel NPU acceleration library

Describe the solution you'd like

Hence, NPU engine can be added to this repo

Additional context

Update in:

• modelui.py
• engine.py
• setup.py
• README.md

Add:

• npu_egnine.py
• requirements-npu.txt
• npu_models.md