Splits the singularity into its component parts + ECS singularity + Support for singularities in containers. (#12132)

* InitialCommit (Broken)

* Fixes compile errors

* PR comments. More doc comments. Fixes

* Makes a singularity/event horizon without radiation/physics a valid state to be in

* VV 'fake' setters, fixes the visualizer, fixes the singularity trying to eat itself instead of nearby things.

* Removes unused dependency from Content.Client.GravityWellSystem

* Testing containment and fake VV setters for SingularityGeneratorComponent

* Fixes gravity wells (broken due to LookupFlags.None). Adds recursive Event Horizon consumption

* Fix merge skew

* Fixes for the master merge

* Fix engine commit

* Dirty is obsolete

* Switch over dirty

* Fix requested changes

* ambiant -> ambient

* Moves EventHorionComponent to Shared

* Proper container handling

* Fixes master merge. Fixes post insertion assertions for singularities. Extends proper container handling to gravity wells and the distortion shader.

* Better support for admemes throwing singularities.

* Moves update timing from accumulators to target times

* Update doc comments

Content.Server/Singularity/Events/EventHorizonContainedEvent.cs

@@ -0,0 +1,31 @@
+using Robust.Shared.Containers;
+using Content.Shared.Singularity.Components;
+
+namespace Content.Shared.Singularity.EntitySystems;
+
+/// <summary>
+/// An event queued when an event horizon is contained (put into a container).
+/// Exists to delay the event horizon eating its way out of the container until events relating to the insertion have been processed.
+/// </summary>
+public sealed class EventHorizonContainedEvent : EntityEventArgs {
+    /// <summary>
+    /// The uid of the event horizon that has been contained.
+    /// </summary>
+    public readonly EntityUid Entity;
+
+    /// <summary>
+    /// The state of the event horizon that has been contained.
+    /// </summary>
+    public readonly EventHorizonComponent EventHorizon;
+
+    /// <summary>
+    /// The arguments of the action that resulted in the event horizon being contained.
+    /// </summary>
+    public readonly EntGotInsertedIntoContainerMessage Args;
+
+    public EventHorizonContainedEvent(EntityUid entity, EventHorizonComponent eventHorizon, EntGotInsertedIntoContainerMessage args) {
+        Entity = entity;
+        EventHorizon = eventHorizon;
+        Args = args;
+    }
+}