docs: add K3ai to showcase

[alefesta]

Motivation

I'd like to showcase k3ai (https://k3ai.in) an opensource tool made to simplify the life of AI practitioners when it comes to learning and experimenting.
I've followed the docs accordingly to submit this PR.

Have you read the Contributing Guidelines on pull requests?

yes I did

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[Josh-Cena]

Thanks. Just so that you know, your initial submission:

• contained duplicate entries.
• contained syntax errors.
• self-assigned the "favorite" tag, which we have stated in the comment that you should not.

I have fixed those for you.

In addition, w.r.t. your website:

• https://k3ai.github.io/docs/command-reference/k3ai this page abuses the <details> element and leads to undesirable UX. People who want to look for information about a command have to browse through all the dropdowns, clicking on them one-by-one. Also, the <summary>, per the HTML spec, should only contain inline elements, so putting headings here is inappropriate. You'd rather want to use separate doc pages instead. Remember, there's no tax on the Internet for taking extra space!
• Your primary color is inaccessible in light mode. You can follow our guide to create an accessible website: https://docusaurus.io/docs/styling-layout#styling-your-site-with-infima

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[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	73
🟢 Accessibility	100
🟢 Best practices	92
🟢 SEO	100
🟢 PWA	90

Lighthouse ran on https://deploy-preview-6952--docusaurus-2.netlify.app/

[alefesta]

Thanks. Just so that you know, your initial submission:

• contained duplicate entries.
• contained syntax errors.
• self-assigned the "favorite" tag, which we have stated in the comment that you should not.

I have fixed those for you.

Tthanks a lot .. sorry about the "favorite" thing was unintentional

In addition, w.r.t. your website:

• https://k3ai.github.io/docs/command-reference/k3ai this page abuses the <details> element and leads to undesirable UX. People who want to look for information about a command have to browse through all the dropdowns, clicking on them one-by-one. Also, the <summary>, per the HTML spec, should only contain inline elements, so putting headings here is inappropriate. You'd rather want to use separate doc pages instead. Remember, there's no tax on the Internet for taking extra space!

Yeah the command-reference need to be re-designed but I tried an approach that could make sense..I see what you mean and I'll follow your suggestion!

• Your primary color is inaccessible in light mode. You can follow our guide to create an accessible website: https://docusaurus.io/docs/styling-layout#styling-your-site-with-infima

Oh, thanks for let me know this !
Also I've signed the CLA..I think the bot just need to re-check it at this point. Thanks again for your help and suggestions!

[Josh-Cena]

No problem. It can take a while for the CLA bot to update. I'll check-in tomorrow morning

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

[Josh-Cena]

Okay, right on time :D