Typing indicator (typing chat bubble) (#8215)

Content.Shared/Chat/TypingIndicator/TypingChangedEvent.cs

@@ -0,0 +1,20 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Chat.TypingIndicator;
+
+/// <summary>
+///     Networked event from client.
+///     Send to server when client started/stopped typing in chat input field.
+/// </summary>
+[Serializable, NetSerializable]
+public sealed class TypingChangedEvent : EntityEventArgs
+{
+    public readonly EntityUid Uid;
+    public readonly bool IsTyping;
+
+    public TypingChangedEvent(EntityUid uid, bool isTyping)
+    {
+        Uid = uid;
+        IsTyping = isTyping;
+    }
+}