Add prediction to hand labeler labels (#25869)

Added prediction to labels

Content.Shared/Labels/Components/LabelComponent.cs

@@ -0,0 +1,24 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Labels.Components;
+
+/// <summary>
+/// Makes entities have a label in their name. Labels are normally given by <see cref="HandLabelerComponent"/>
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class LabelComponent : Component
+{
+    /// <summary>
+    /// Current text on the label. If set before map init, during map init this string will be localized.
+    /// This permits localized preset labels with fallback to the text written on the label.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public string? CurrentLabel { get; set; }
+
+    /// <summary>
+    ///  The original name of the entity
+    ///  Used for reverting the modified entity name when the label is removed
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public string? OriginalName { get; set; }
+}

Content.Shared/Labels/EntitySystems/SharedLabelSystem.cs

@@ -0,0 +1,28 @@
+using Content.Shared.Examine;
+using Content.Shared.Labels.Components;
+using Robust.Shared.Utility;
+
+namespace Content.Shared.Labels.EntitySystems;
+
+public abstract partial class SharedLabelSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<LabelComponent, ExaminedEvent>(OnExamine);
+    }
+
+    private void OnExamine(EntityUid uid, LabelComponent? label, ExaminedEvent args)
+    {
+        if (!Resolve(uid, ref label))
+            return;
+
+        if (label.CurrentLabel == null)
+            return;
+
+        var message = new FormattedMessage();
+        message.AddText(Loc.GetString("hand-labeler-has-label", ("label", label.CurrentLabel)));
+        args.PushMessage(message);
+    }
+}