CCSAAS-2087: Added info about editions component'

Author: jeff-matthews

README.md

@@ -27,6 +27,28 @@ To build the site locally:
    yarn dev
    ```
 
+## Components
+
+To achieve specific user experience goals for Commerce documentation, this repo overrides the original [`Edition`](https://github.com/adobe/aio-theme/blob/main/packages/gatsby-theme-aio/src/components/Edition/index.js) component from the upstream [`aio-theme`](https://github.com/adobe/aio-theme/) repo that we use as a dependency.
+
+### Edition
+
+The custom `Edition` component in this repo displays a badge indicating whether a feature or functionality is available in specific Adobe Commerce environments. It has been customized to align with the badges that we use in Experience League docs.
+
+#### Usage
+
+```yaml
+# Page-level (metadata)
+edition: saas # For SaaS-only features
+edition: paas # For PaaS-only features
+```
+
+```md
+<!-- Section-level (inline) -->
+<Edition name="paas" />  <!-- For PaaS-only features -->
+<Edition name="saas" />  <!-- For SaaS-only features -->
+```
+
 ## Resources
 
 See the following resources to learn more about using the theme: