Feat/Support-Qwix-Quantization-For-NNX-Models

[hsuan-lun-chiang]

Description

This PR adds support for running Qwix quantization on NNX models, leveraging the NNX decoder architecture.

Tests

Please describe how you tested this change, and include any instructions and/or
commands to reproduce.

Checklist

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• I have necessary comments in my code, particularly in hard-to-understand areas.
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• I have made or will make corresponding changes to the doc if needed, including adding new documentation pages to the relevant Table of Contents (toctree directive) as explained in our documentation.