updated api docs and enabled paste_as_text editor option

ui/src/components/collections/docs/ListApiDocs.svelte

@@ -217,6 +217,10 @@
             <td>
                 Comma separated string of the fields to return in the JSON response
                 <em>(by default returns all fields)</em>.
+                <br />
+                Use <code>*</code> to target all keys from the specific depth level.
+                <br />
+                For example: <code>?fields=*,expand.author.name</code>
             </td>
         </tr>
         <tr>