add documentation page for api playground
add api playground to docs

_the playground doesn't support auth yet, but plan to add soon_

_**preview of docs page below**_

# Dataset Viewer API Playground

The [API Playground](https://huggingface.co/spaces/cfahlgren1/datasets-api-playground) is a space that allows you to make requests to the Dataset Viewer API and visualize the results in real-time. It's a great way to explore the capabilities of the API and test different queries.

<div class="flex justify-center">
    <img
      src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/datasets-server/datasets-api-playground.png"
      alt="Dataset API Playground"
    />
  </a>
</div>

add documentation page for api playground: add api playground to docs

_the playground doesn't support auth yet, but plan to add soon_

_**preview of docs page below**_

# Dataset Viewer API Playground

The [API Playground](https://huggingface.co/spaces/cfahlgren1/datasets-api-playground) is a space that allows you to make requests to the Dataset Viewer API and visualize the results in real-time. It's a great way to explore the capabilities of the API and test different queries.

<div class="flex justify-center">
    <img
      src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/datasets-server/datasets-api-playground.png"
      alt="Dataset API Playground"
    />
  </a>
</div>
