Support separate displacement maps for left and right hand (#35820)

* Update HandsSystem.cs

* Update HandsComponent.cs

Content.Shared/Hands/Components/HandsComponent.cs

@@ -78,9 +78,24 @@ public sealed partial class HandsComponent : Component
     [DataField, ViewVariables(VVAccess.ReadWrite)]
     public TimeSpan ThrowCooldown = TimeSpan.FromSeconds(0.5f);
 
+    /// <summary>
+    ///     Fallback displacement map applied to all sprites in the hand, unless otherwise specified
+    /// </summary>
     [DataField]
     public DisplacementData? HandDisplacement;
 
+    /// <summary>
+    ///     If defined, applies to all sprites in the left hand, ignoring <see cref="HandDisplacement"/>
+    /// </summary>
+    [DataField]
+    public DisplacementData? LeftHandDisplacement;
+
+    /// <summary>
+    ///     If defined, applies to all sprites in the right hand, ignoring <see cref="HandDisplacement"/>
+    /// </summary>
+    [DataField]
+    public DisplacementData? RightHandDisplacement;
+
     /// <summary>
     /// If false, hands cannot be stripped, and they do not show up in the stripping menu.
     /// </summary>