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/Species/SpeciesManager.cs

@@ -0,0 +1,6 @@
+namespace Content.Shared.Species;
+
+public class SpeciesManager
+{
+    public const string DefaultSpecies = "Human";
+}

Content.Shared/Species/SpeciesPrototype.cs

@@ -0,0 +1,53 @@
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Shared.Species;
+
+[Prototype("species")]
+public class SpeciesPrototype : IPrototype
+{
+    /// <summary>
+    /// Prototype ID of the species.
+    /// </summary>
+    [DataField("id", required: true)]
+    public string ID { get; } = default!;
+
+    /// <summary>
+    /// User visible name of the species.
+    /// </summary>
+    [DataField("name", required: true)]
+    public string Name { get; } = default!;
+
+    /// <summary>
+    /// Whether the species is available "at round start" (In the character editor)
+    /// </summary>
+    [DataField("roundStart", required: true)]
+    public bool RoundStart { get; } = false;
+
+    /// <summary>
+    /// Prototype used by the species as a body.
+    /// </summary>
+    [DataField("prototype", required: true)]
+    public string Prototype { get; } = default!;
+
+    /// <summary>
+    /// Prototype used by the species for the dress-up doll in various menus.
+    /// </summary>
+    [DataField("dollPrototype", required: true)]
+    public string DollPrototype { get; } = default!;
+
+    /// <summary>
+    /// Method of skin coloration used by the species.
+    /// </summary>
+    [DataField("skinColoration", required: true)]
+    public SpeciesSkinColor SkinColoration { get; }
+
+
+}
+
+public enum SpeciesSkinColor
+{
+    HumanToned,
+    Hues,
+}