Adds hand labelers (#4903)

* Adds hand labelers

* Removes unnecessary thing

* Docs

* Reverts some changes

* Addresses comments and adds inhand sprites

* Addressed comments

Co-authored-by: Watermelon914 <3052169-Watermelon914@users.noreply.gitlab.com>

Content.Client/HandLabeler/UI/HandLabelerBoundUserInterface.cs

@@ -0,0 +1,60 @@
+using Content.Shared.HandLabeler;
+using Robust.Client.GameObjects;
+using Robust.Shared.GameObjects;
+
+namespace Content.Client.HandLabeler.UI
+{
+    /// <summary>
+    /// Initializes a <see cref="HandLabelerWindow"/> and updates it when new server messages are received.
+    /// </summary>
+    public class HandLabelerBoundUserInterface : BoundUserInterface
+    {
+        private HandLabelerWindow? _window;
+
+        public HandLabelerBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey)
+        {
+        }
+
+        protected override void Open()
+        {
+            base.Open();
+
+            _window = new HandLabelerWindow();
+            if (State != null)
+                UpdateState(State);
+
+            _window.OpenCentered();
+
+            _window.OnClose += Close;
+            _window.OnLabelEntered += OnLabelChanged;
+
+        }
+
+        private void OnLabelChanged(string newLabel)
+        {
+            SendMessage(new HandLabelerLabelChangedMessage(newLabel));
+            Close();
+        }
+
+        /// <summary>
+        /// Update the UI state based on server-sent info
+        /// </summary>
+        /// <param name="state"></param>
+        protected override void UpdateState(BoundUserInterfaceState state)
+        {
+            base.UpdateState(state);
+            if (_window == null || state is not HandLabelerBoundUserInterfaceState cast)
+                return;
+
+            _window.SetCurrentLabel(cast.CurrentLabel);
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            base.Dispose(disposing);
+            if (!disposing) return;
+            _window?.Dispose();
+        }
+    }
+
+}