Travelling pointing arrows, brains can no longer point (#24864)

* Decoupled from gravity, constant animation time, manual networking, cubic interpolation

* Reduced overshoot

* Implemented PointAttemptEvent, reacts with mobstate & sleeping

* Brains can no longer point, PBs must be inside a chassis

* Removed chassis check, made callback more obvious

Content.Client/Pointing/Components/PointingArrowComponent.cs

@@ -1,19 +1,12 @@
-using System.Numerics;
 using Content.Shared.Pointing.Components;
+using System.Numerics;
 
 namespace Content.Client.Pointing.Components;
 [RegisterComponent]
 public sealed partial class PointingArrowComponent : SharedPointingArrowComponent
 {
     /// <summary>
-    /// How long it takes to go from the bottom of the animation to the top.
-    /// </summary>
-    [ViewVariables(VVAccess.ReadWrite)]
-    [DataField("animationTime")]
-    public float AnimationTime = 0.5f;
-
-    /// <summary>
-    /// How far it goes in any direction.
+    /// How far the arrow moves up and down during the floating phase.
     /// </summary>
     [ViewVariables(VVAccess.ReadWrite)]
     [DataField("offset")]