add KerasRS video to docs

[yufengg]

need to confirm that it renders okay on the actual website, not just on the github preview

[gemini-code-assist]

Summary of Changes

Hello @yufengg, 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 enhances the Keras Recommenders documentation by integrating a YouTube video directly into its main index page. The addition of this video aims to provide a more dynamic and engaging resource for users, offering a visual explanation or overview of Keras Recommenders, thereby improving the overall learning experience.

Highlights

• Video Embedding: A YouTube video embed has been added to the Keras Recommenders documentation page.
• Interactive Content: The embed features a clickable thumbnail image that links directly to the KerasRS video on YouTube.
• Styling: The video embed is horizontally centered on the page using inline HTML styling.

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Changelog

• templates/keras_rs/index.md
  • Added an HTML block containing a div, a, and img tag to embed a YouTube video.
  • The embedded video is for KerasRS and includes a thumbnail image with a border.
  • The video embed is centered on the page using text-align: center.

Activity

• The author, yufengg, has indicated that the rendering of the video embed needs to be confirmed on the live website, not just in the GitHub preview.

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[gemini-code-assist]

Code Review

This pull request introduces an embedded YouTube video thumbnail to the Keras Recommenders documentation. The addition is functional, but there are opportunities to improve the HTML structure for better web standards adherence, security, and maintainability.

[gemini-code-assist]

The image source uses http instead of https. It's best practice to use https to avoid mixed content warnings and ensure secure connections, especially if the main website is served over HTTPS.

Suggested change

	target="_blank"><img src="http://img.youtube.com/vi/uV3gymO9K98/hqdefault.jpg"
	target="_blank"><img src="https://img.youtube.com/vi/uV3gymO9K98/hqdefault.jpg"

[gemini-code-assist]

The border attribute on the <img> tag is deprecated in HTML5. Styling should be handled using CSS for better separation of concerns and maintainability.

Suggested change

	alt="KerasRS Video" width="360" height="270" border="10" /></a>
	alt="KerasRS Video" width="360" height="270" /></a>

[gemini-code-assist]

Using inline styles like style="text-align: center;" is generally discouraged for maintainability and reusability. While it might be necessary in Markdown for quick styling, consider if a CSS class could be applied if there's a global stylesheet to keep styling consistent.