Remove IClientSingularityInstance, move visual effects to SingularityDistortionComponent (#4194)

* Remove IClientSingularityInstance

* In and out 5 minute refactor

* Component states for singularity distortion

* Fix distortion states

* Address reviews

Content.Shared/Singularity/Components/SharedSingularityComponent.cs

@@ -2,25 +2,43 @@ using System;
 using Content.Shared.NetIDs;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
 
 namespace Content.Shared.Singularity.Components
 {
-
     public abstract class SharedSingularityComponent : Component
     {
         public override string Name => "Singularity";
         public override uint? NetID => ContentNetIDs.SINGULARITY;
 
+        [DataField("deleteFixture")] public string? DeleteFixtureId { get; } = default;
 
-        [Serializable, NetSerializable]
-        protected sealed class SingularityComponentState : ComponentState
+        /// <summary>
+        ///     Changed by <see cref="SharedSingularitySystem.ChangeSingularityLevel"/>
+        /// </summary>
+        [ViewVariables]
+        public int Level { get; set; }
+
+        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
         {
-            public int Level { get; }
-
-            public SingularityComponentState(int level) : base(ContentNetIDs.SINGULARITY)
+            if (curState is not SingularityComponentState state)
             {
-                Level = level;
+                return;
             }
+
+            EntitySystem.Get<SharedSingularitySystem>().ChangeSingularityLevel(this, state.Level);
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class SingularityComponentState : ComponentState
+    {
+        public int Level { get; }
+
+        public SingularityComponentState(int level) : base(ContentNetIDs.SINGULARITY)
+        {
+            Level = level;
         }
     }
 }