added Character Setup (#511)

* added Character Setup

* whoops

* reverted unrelated changes

* Made everything work post-rebase

* Removed unused PreferencesChanged event

* nope, don't need this

* HumanoidProfileEditorPanel -> HumanoidProfileEditor

* Set initial data for hair pickers

* Fixed nullable warning

* Renamed LooksComponent -> HumanoidAppearanceComponent

* Renamed LooksComponentState -> HumanoidAppearanceComponentState

* Final renaming maybe

* Use a human-like dummy instead of a real human

* Change preferences structs back to classes

Content.Shared/Preferences/Appearance/HumanoidCharacterAppearance.cs

@@ -1,11 +1,9 @@
-using System;
-using Robust.Shared.Serialization;
-
 namespace Content.Shared.Preferences.Appearance
 {
     public enum HumanoidVisualLayers
     {
         Hair,
         FacialHair,
+        Body
     }
 }