Typing indicator (typing chat bubble) (#8215)

Content.Shared/Chat/TypingIndicator/SharedTypingIndicatorSystem.cs

@@ -0,0 +1,9 @@
+namespace Content.Shared.Chat.TypingIndicator;
+
+/// <summary>
+///     Sync typing indicator icon between client and server.
+/// </summary>
+public abstract class SharedTypingIndicatorSystem : EntitySystem
+{
+
+}