Moves HumanoidAppearanceComponent to ECS (#4855)

* Moves HumanoidCharacterAppearance to ECS

* Makes HumanoidAppearanceSystem work over networks

* Makes HumanoidAppearanceSystem more efficient

* Cleans up the files

* Updates privacy on a couple of functions

* Fixes a few using references, renames a file

* Makes HumanoidAppearanceSystem more cleaner

* Fixes Magic Mirror

* Cleanup

* HumanoidAppearanceComponent now has a friend

SharedHumanoidAppearanceSystem is only allowed to act on this, now

* Fixes the Body-HumanoidAppearance ECS scaffolding

* a little cleanup never hurt anybody

* quick fix for magic mirror appearance access

* Replaces a networked event with a local one

This one was... causing bugs

Content.Shared/Body/Components/SharedBodyComponent.cs

@@ -8,6 +8,7 @@ using Content.Shared.Body.Part.Property;
 using Content.Shared.Body.Preset;
 using Content.Shared.Body.Slot;
 using Content.Shared.Body.Template;
+using Content.Shared.CharacterAppearance.Systems;
 using Content.Shared.Damage;
 using Content.Shared.Damage.Prototypes;
 using Content.Shared.Movement.Components;
@@ -151,6 +152,7 @@ namespace Content.Shared.Body.Components
 
             var argsAdded = new BodyPartAddedEventArgs(slot.Id, part);
 
+            EntitySystem.Get<SharedHumanoidAppearanceSystem>().BodyPartAdded(Owner.Uid, argsAdded);
             foreach (var component in Owner.GetAllComponents<IBodyPartAdded>().ToArray())
             {
                 component.BodyPartAdded(argsAdded);
@@ -177,6 +179,8 @@ namespace Content.Shared.Body.Components
 
             var args = new BodyPartRemovedEventArgs(slot.Id, part);
 
+
+            EntitySystem.Get<SharedHumanoidAppearanceSystem>().BodyPartRemoved(Owner.Uid, args);
             foreach (var component in Owner.GetAllComponents<IBodyPartRemoved>())
             {
                 component.BodyPartRemoved(args);

Content.Shared/Body/Part/IBodyPartAdded.cs

@@ -1,5 +1,6 @@
 using System;
 using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.Body.Part
 {
@@ -17,6 +18,8 @@ namespace Content.Shared.Body.Part
         void BodyPartAdded(BodyPartAddedEventArgs args);
     }
 
+
+    [Serializable, NetSerializable]
     public class BodyPartAddedEventArgs : EventArgs
     {
         public BodyPartAddedEventArgs(string slot, SharedBodyPartComponent part)

Content.Shared/Body/Part/IBodyPartRemoved.cs

@@ -1,4 +1,5 @@
 using System;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.Body.Part
 {
@@ -16,6 +17,7 @@ namespace Content.Shared.Body.Part
         void BodyPartRemoved(BodyPartRemovedEventArgs args);
     }
 
+    [Serializable, NetSerializable]
     public class BodyPartRemovedEventArgs : EventArgs
     {
         public BodyPartRemovedEventArgs(string slot, SharedBodyPartComponent part)