add documentation page for api playground

Author: cfahlgren1

docs/source/_toctree.yml

@@ -6,6 +6,8 @@
       title: Quickstart
     - local: analyze_data
       title: Analyze a dataset on the Hub
+    - local: api_playground
+      title: API Playground
 - title: Guides
   sections:
     - local: valid

docs/source/api_playground.md

@@ -0,0 +1,20 @@
+# Dataset Viewer API Playground
+
+The Dataset Viewer API is a powerful tool for exploring and interacting with datasets on the HuggingFace Hub. 
+
+It includes a set of endpoints for querying, filtering, and analyzing data from various datasets.
+
+The base URL for the Dataset Viewer API is `https://datasets-server.huggingface.co/`.
+
+## Try it out
+
+Use the [API Playground](https://github.com/huggingface/dataset-viewer/tree/main/api_playground) to make requests to the Dataset Viewer API and visualize the results.
+
+<div class="flex justify-center">
+  <a href="https://huggingface.co/spaces/cfahlgren1/datasets-api-playground" target="_blank">
+    <img
+      src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/datasets-server/datasets-api-playground.png"
+      alt="Dataset API Playground"
+    />
+  </a>
+</div>