Add a disclaimer about ITREX being discontinued

[rachitchadha]

Add a disclaimer at top of this notebook that Umbrella repo containing IET and neural-chat (ITREX) has been discontinued

Summary

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Type of Change (Mandatory)

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• Feature enhancement
• Bug fix
• Documentation update
• Security improvement
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Description (Mandatory)

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Testing

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[teoparvanov]

I suggest to re-word this slightly:

This experiment is now deprecated. The ITREX repository, which serves as an umbrella for IET(Intel Extension For Transformers) and neural-chat, is no longer actively maintained.

[kminhta]

FYI, "ITREX" is the Intel Extension Transformers (the acronym is basically Intel Transformers Extension), so I would further simplify and reword it to:

This experiment is now deprecated. The ITREX (Intel(R) Extension For Transformers) repository is no longer actively maintained.

[teoparvanov]

Please sign your commits by running git commit -s -m "...". This will fix the DCO verification failure in the PR pipeline.

[psfoley]

If ITREX / Neuralchat libraries are archived, they should be removed from the example. From looking through the notebook I expect it's straightforward to swap in other Huggingface libraries here, but I'll defer to @kta-intel if he has a different recommendation as this is his original example

[kminhta]

If ITREX / Neuralchat libraries are archived, they should be removed from the example. From looking through the notebook I expect it's straightforward to swap in other Huggingface libraries here, but I'll defer to @kta-intel if he has a different recommendation as this is his original example

Yeah, it should be fairly straightforward to swap ITREX calls with HF Transformer calls, but I actually recommend we remove this example entirely. As it stands, without the ITREX components (which I agree should be removed since they are archived), this example won't add any unique functionalities from the phi-4 fine-tuning example

WDYT? @teoparvanov @rachitchadha