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/ICharacterProfile.cs

@@ -2,6 +2,8 @@ namespace Content.Shared.Preferences
 {
     public interface ICharacterProfile
     {
+        string Name { get; }
+        ICharacterAppearance CharacterAppearance { get; }
         bool MemberwiseEquals(ICharacterProfile other);
     }
 }