Upstream species (#6066)

* Step 1 of porting; grabbed most of the files via patches.

* Add species field to the DB

* Appearance patches for slimes.

* Fix the db test.

* Add slime's biocompat.

* slimby

* Fixes, allow specifying if a species is playable or not.

* Update Content.Client/Preferences/UI/HumanoidProfileEditor.xaml.cs

Co-authored-by: Javier Guardia Fernández <DrSmugleaf@users.noreply.github.com>

* Update Content.Client/Preferences/UI/HumanoidProfileEditor.xaml.cs

Co-authored-by: Javier Guardia Fernández <DrSmugleaf@users.noreply.github.com>

* Update Content.Client/Preferences/UI/HumanoidProfileEditor.xaml.cs

Co-authored-by: Javier Guardia Fernández <DrSmugleaf@users.noreply.github.com>

* Address reviews.

* Address reviews.

* make an if-case.

* Fix a goof where species wouldn't get shown in the editor correctly (it'd always default to human)

Co-authored-by: Javier Guardia Fernández <DrSmugleaf@users.noreply.github.com>

Content.Shared/CharacterAppearance/Components/HumanoidAppearanceComponent.cs

@@ -42,6 +42,14 @@ namespace Content.Shared.CharacterAppearance.Components
         [ViewVariables]
         [DataField("canColorFacialHair")]
         public bool CanColorFacialHair { get; set; } = true;
+
+        [ViewVariables]
+        [DataField("hairMatchesSkin")]
+        public bool HairMatchesSkin { get; set; } = false;
+
+        [ViewVariables]
+        [DataField("hairAlpha")]
+        public float HairAlpha { get; set; } = 1.0f;
     }
 
     [Serializable, NetSerializable]