feat: Added new docs

docusaurus/docs/Flutter/stream_chat/muting_channels.mdx

@@ -4,3 +4,59 @@ sidebar_position: 12
 title: Muting Channels
 ---
 
+Messages added to a channel will not trigger push notifications, nor change the unread count for the users that muted it.
+
+By default, mutes stay in place indefinitely until the user removes it; however, you can optionally set an expiration time.
+
+The list of muted channels and their expiration time is returned when the user connects.
+
+### Channel Mute
+
+```dart
+// mute channel for current user
+await channel.mute();
+
+// mute a channel for 2 weeks
+await channel.mute(expiration: Duration(days: 15));
+
+// mute a channel for 10 seconds
+await channel.mute(expiration: Duration(seconds: 10));
+
+// check if channel is muted
+channel.isMuted;
+```
+
+### Query Muted Channels
+
+Muted channels can be filtered or excluded by using the `muted` in your query channels filter.
+
+```dart
+// retrieve all channels excluding muted ones
+await client.queryChannels(
+    filter: {
+      'members': {
+        r'$in': [userId],
+      },
+      'muted': false,
+    }
+  );
+
+// retrieve all muted channels
+await client.queryChannels(
+    filter: {
+      'muted': true,
+    }
+  );
+```
+
+### Remove a Channel Mute
+
+Whenever you need to unmute, you are able to.
+
+```dart
+// unmute channel for current user
+await channel.unmute();
+
+// unmute channel for a user (server-side)
+await channel.unmute({ user_id: userId });
+```