Implement dynamic channel list

ChatTwo/Http/MessageProtocol/DataStructure.cs

@@ -7,6 +7,11 @@ public struct SwitchChannel(string name)
     [JsonProperty("channel")] public string Name = name;
 }
 
+public struct ChannelList(Dictionary<string, uint> channels)
+{
+    [JsonProperty("channels")] public Dictionary<string, uint> Channels = channels;
+}
+
 public struct Messages(MessageResponse[] set)
 {
     [JsonProperty("messages")] public MessageResponse[] Set = set;

ChatTwo/Http/MessageProtocol/OutgoingMessage.cs

@@ -5,6 +5,8 @@ namespace ChatTwo.Http.MessageProtocol;
 
 public class CloseEvent() : BaseEvent("close");
 
+public class ChannelListEvent(ChannelList channelList) : BaseEvent("channel-list", JsonConvert.SerializeObject(channelList));
+
 public class SwitchChannelEvent(SwitchChannel switchChannel) : BaseEvent("switch-channel", JsonConvert.SerializeObject(switchChannel));
 
 public class NewMessageEvent(Messages messages) : BaseEvent("new-message", JsonConvert.SerializeObject(messages));