Add prediction to Spill Container verb, add dummy TrySpill methods to shared (#25813)

* Moved abstract spill methods to shared; added prediction to spill container verb.

* Rerun tests

* Requested changes

* Note Client behavior in Spill method docs

Content.Client/Fluids/PuddleSystem.cs

@@ -1,7 +1,9 @@
 using Content.Client.IconSmoothing;
+using Content.Shared.Chemistry.Components;
 using Content.Shared.Fluids;
 using Content.Shared.Fluids.Components;
 using Robust.Client.GameObjects;
+using Robust.Shared.Map;
 
 namespace Content.Client.Fluids;
 
@@ -21,7 +23,7 @@ public sealed class PuddleSystem : SharedPuddleSystem
         if (args.Sprite == null)
             return;
 
-        float volume = 1f;
+        var volume = 1f;
 
         if (args.AppearanceData.TryGetValue(PuddleVisuals.CurrentVolume, out var volumeObj))
         {
@@ -64,4 +66,38 @@ public sealed class PuddleSystem : SharedPuddleSystem
             args.Sprite.Color *= baseColor;
         }
     }
+
+    #region Spill
+
+    // Maybe someday we'll have clientside prediction for entity spawning, but not today.
+    // Until then, these methods do nothing on the client.
+    /// <inheritdoc/>
+    public override bool TrySplashSpillAt(EntityUid uid, EntityCoordinates coordinates, Solution solution, out EntityUid puddleUid, bool sound = true, EntityUid? user = null)
+    {
+        puddleUid = EntityUid.Invalid;
+        return false;
+    }
+
+    /// <inheritdoc/>
+    public override bool TrySpillAt(EntityCoordinates coordinates, Solution solution, out EntityUid puddleUid, bool sound = true)
+    {
+        puddleUid = EntityUid.Invalid;
+        return false;
+    }
+
+    /// <inheritdoc/>
+    public override bool TrySpillAt(EntityUid uid, Solution solution, out EntityUid puddleUid, bool sound = true, TransformComponent? transformComponent = null)
+    {
+        puddleUid = EntityUid.Invalid;
+        return false;
+    }
+
+    /// <inheritdoc/>
+    public override bool TrySpillAt(TileRef tileRef, Solution solution, out EntityUid puddleUid, bool sound = true, bool tileReact = true)
+    {
+        puddleUid = EntityUid.Invalid;
+        return false;
+    }
+
+    #endregion Spill
 }