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.Shared/Fluids/Components/SpillableComponent.cs

@@ -2,6 +2,12 @@ using Content.Shared.FixedPoint;
 
 namespace Content.Shared.Fluids.Components;
 
+/// <summary>
+/// Makes a solution contained in this entity spillable.
+/// Spills can occur when a container with this component overflows,
+/// is used to melee attack something, is equipped (see <see cref="SpillWorn"/>),
+/// lands after being thrown, or has the Spill verb used.
+/// </summary>
 [RegisterComponent]
 public sealed partial class SpillableComponent : Component
 {