Add LiveObjects REST SDK usage docs

Resolves AIT-319

Author: VeskeR

src/data/nav/liveobjects.ts

@@ -98,6 +98,10 @@ export default {
           name: 'Object storage',
           link: '/docs/liveobjects/storage',
         },
+        {
+          name: 'Using the REST SDK',
+          link: '/docs/liveobjects/rest-sdk-usage',
+        },
         {
           name: 'Using the REST API',
           link: '/docs/liveobjects/rest-api-usage',

src/pages/docs/api/rest-sdk/channels.mdx

@@ -82,6 +82,12 @@ Provides access to the [REST Presence](/docs/presence-occupancy/presence) object
 
 Provides access to the [PushChannel](/docs/api/realtime-sdk/push#push-channel) object for this channel which can be used to access members present on the channel, or participate in presence.
 
+<If lang="javascript,nodejs">
+#### object <a id="object" />
+
+Provides access to the [RestObject](/docs/liveobjects/rest-sdk-usage) for this channel which can be used to read and modify LiveObjects on a channel using the REST SDK.
+</If>
+
 ### Channel Methods
 
 #### <If lang="javascript,nodejs,php,python,ruby,java,swift,objc,go,flutter">publish</If><If lang="csharp,go">Publish</If>