Layers: one owner puts orbitals above the ship plane and floaters below; per-hull GridOffset is deleted

GameplaySettings carries ShipLayerHeight 3, OrbitalLayerHeight 15, FloaterLayerHeight 0 (authored in Settings.asset).
Entity.LayerHeight (Ship, OrbitalEntity) is the one offset RideHeight adds; DrawAhead.FloaterHeight is the floater
height ItemPickup and MineInstance draw at. HullData.GridOffset (Key 26) and the pickup/mine/prefab GridOffset fields
are gone with every reader. Fixtures (DrawnPose, FireControl*, ImpactFeedback) take heights from the layer owner;
LayerTests pin each kind's layer. FloatingItemsDrawnSmoke follows. ItemPickup/MineInstance.Bind take the settings from
ZoneRenderer. Builds as one commit with its tests; not compile-verified until the cut's head run.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assets/Scripts/ServerShared/Ship.cs

@@ -16,6 +16,8 @@ using quaternion = CultMath.quaternion;
 [MessagePackObject]
 public class Ship : Entity
 {
+    public override float LayerHeight => ItemManager.GameplaySettings.ShipLayerHeight;
+
     
     // [Key("bindings")]   public Dictionary<KeyCode,Guid>    Bindings = new Dictionary<KeyCode,Guid>();
     //[IgnoreMember] public int HullHardpointCount;