Reviewed and Updated models for Shared project

RelayShared/Services/ChannelTransmissions.cs

@@ -0,0 +1,18 @@
+namespace RelayShared.Services;
+
+public sealed class ChannelItem
+{
+    public string ChannelId { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+    
+    public ChannelType Type { get; set; }
+    
+    public string Group { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; }
+}
+
+public sealed class SocketChannelList
+{
+    public SignalType Type { get; set; } = SignalType.ChannelList;
+    public List<ChannelItem> Channels { get; set; } = [];
+}