Cleanup species prototypes a bit (#9513)

* Cleanup species prototypes a bit

Skeletons were very stale because they didn't inherit from mobhuman but now they should have similar components as every other species.

I also added a generic abstract base species to make custom species easier (where they may not want to have humans COUGH VILOUS).

* a

* drugs

* gonflicts

* no more conflicts I beg

Content.IntegrationTests/Tests/Interaction/InRangeUnobstructed.cs

@@ -12,7 +12,7 @@ namespace Content.IntegrationTests.Tests.Interaction
     [TestOf(typeof(SharedInteractionSystem))]
     public sealed class InRangeUnobstructed
     {
-        private const string HumanId = "MobHumanBase";
+        private const string HumanId = "MobHuman";
 
         private const float InteractionRange = SharedInteractionSystem.InteractionRange;