[PXCT-969] add tiny-ml-kit step file

[Hannes7eicher]

What This PR Changes

This PR adds the step file to the tiny ml kit

Contribution Guidelines

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[jhansson-ard]

@Hannes7eicher let's run the preview so that nothing breaks!

[github-actions]

Preview Deployment

🚀 Preview this PR: https://6853e7215b22ba718cbfdd5d--docs-content.netlify.app
📍 Commit SHA: 8d151e7

[jhansson-ard]

I mean, through the direct URL it doesn't look good but then again I don't think people go there (also it didn't look good before either haha)

For me, I think it could be good enough!

[TaddyHC]

@Hannes7eicher ! I agree with @jhansson-ard 's point in this case, since the hardware is in unlisted directory and so on. I'm not sure if the file should appear within the downloadable resources in this case (I think it should still appear, even if it is in unlisted directory), so I'd like to suggest by compressing the step file as we do and name as AKX00028-shield-step for example. Otherwise, based on the observation until now, lgtm

[jhansson-ard]

True @TaddyHC ! It might be the name of the file that makes it not show, please @Hannes7eicher try to rename the file and let's see

[Hannes7eicher]

@jhansson-ard @TaddyHC I compressed the file and renamed it to AKX00028-shield-step.

I checked the preview and it now appears in the download section, so I will go ahead and merge this.