Adds grappling gun (#16662)

Content.Client/Physics/JointVisualsSystem.cs

@@ -0,0 +1,20 @@
+using Robust.Client.Graphics;
+
+namespace Content.Client.Physics;
+
+public sealed class JointVisualsSystem : EntitySystem
+{
+    [Dependency] private readonly IOverlayManager _overlay = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        _overlay.AddOverlay(new JointVisualsOverlay(EntityManager));
+    }
+
+    public override void Shutdown()
+    {
+        base.Shutdown();
+        _overlay.RemoveOverlay<JointVisualsOverlay>();
+    }
+}