[CHANGE] Finished impl required data for client

Manager.YouTube/Models/Innertube/Channel.cs

@@ -1,10 +1,11 @@
 namespace Manager.YouTube.Models.Innertube;
 
-public class ChannelFetch
+public class Channel
 {
     public bool NoIndex { get; set; }
     public bool Unlisted { get; set; }
     public bool FamilySafe { get; set; }
+    public string? ChannelName { get; set; }
     public string? Handle { get; set; }
     public string? Description { get; set; }
     public List<string> AvailableCountries { get; set; } = [];

Manager.YouTube/Models/Innertube/ClientState.cs

@@ -4,6 +4,7 @@ namespace Manager.YouTube.Models.Innertube;
 
 public class ClientState : AdditionalJsonData
 {
+    public bool IsPremiumUser { get; set; }
     [JsonPropertyName("INNERTUBE_API_KEY")]
     public string? InnertubeApiKey { get; set; }