Implement designs for Testimonial component within Olivero for XB

Taking a look at this now. I will open a PR soon.

I'm unsure how to load the placeholder image as in the example above.

Still needs some work but it looks like the image above.

kristen pol → made their first commit to this issue’s fork.

More updates are needed but the above changes include:

• Move status to experimental per 🐛 Mark the XB components as experimental, not stable Active
• Wording changes for clarity
• Changed from explicit person and place (Princeton) as IMO we should put a dummy person/role
• Removed attributes as it's auto-injected
• Formatting cleanup in twig file

The image isn't working right now so that's the next thing to fix.

More cleanup...

The "tagline" in Figma is "content" in the yml file so I removed the redundant tagline.

And make the content a textarea so they can see the text they are adding since it'll probably be a sentence or more.

Unassigning from @vasantha deepika as we are going fast here... if you want to do some more work on this, please ping me in Slack to coordinate.

Latest testimonial component stacked on top of feature component.

Using the naming convention from 📌 Implement designs for Feature component within Olivero for XB Active (cta => link).

Here's what it looks like now. The link styling might need some tweaking.