feat: identify, presence update commands

Foxcord/Models/Activity.cs

@@ -0,0 +1,24 @@
+namespace Foxcord.Models;
+
+public record Activity(
+    string Name,
+    ActivityType Type,
+    string? Url = null,
+    DateTimeOffset CreatedAt = default,
+    ActivityTimestamps? Timestamps = null,
+    ActivityEmoji? Emoji = null,
+    string? State = null);
+
+public record ActivityTimestamps(int? Start = null, int? End = null);
+
+public record ActivityEmoji(string Name, Snowflake? Id = null, bool? Animated = null);
+
+public enum ActivityType
+{
+    Playing = 0,
+    Streaming = 1,
+    Listening = 2,
+    Watching = 3,
+    Custom = 4,
+    Competing = 5,
+}

Foxcord/Models/User.cs

@@ -2,7 +2,7 @@ using System.Text.Json.Serialization;
 
 namespace Foxcord.Models;
 
-public class User
+public record User
 {
     public Snowflake Id { get; init; }
     public required string Username { get; init; }