Add keras nnx guide to guides master

[divyashreepathihalli]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @divyashreepathihalli, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new guide to the Keras documentation. The primary purpose of this change is to provide users with comprehensive instructions on how to effectively utilize Keras with the NNX backend. By adding this guide, the project aims to enhance user understanding and facilitate smoother integration of Keras with this specific backend, thereby improving the overall documentation and user experience.

Highlights

• New Guide Integration: A new entry for "How to use Keras with NNX backend" has been added to the guides_master.py script. This addition integrates the new guide into the main documentation structure, making it accessible to users.

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[gemini-code-assist]

Code Review

This pull request adds a new developer guide for using Keras with the Flax NNX backend. The change correctly adds an entry for the new guide to the guides_master.py configuration file. My feedback includes a suggestion to adjust the title of the new guide for better stylistic consistency with other guides in the list and with the content of the guide itself.

[gemini-code-assist]

For consistency with other guide titles in this list, which are typically concise noun or gerund phrases (e.g., 'The Functional API', 'Distributed training with Keras 3'), consider rephrasing this. A title like 'Keras and NNX Integration' would align better with the existing style, improve scannability, and be more consistent with the guide's own H1 ('A Guide to the Keras & Flax NNX Integration').

Suggested change

	"title": "How to use Keras with NNX backend",
	"title": "Keras and NNX Integration",