Re-organize all projects (#4166)

Content.Shared/Body/Part/BodyPartCompatibility.cs

@@ -0,0 +1,17 @@
+#nullable enable
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Body.Part
+{
+    /// <summary>
+    ///     Determines whether two <see cref="IBodyPart"/>s can connect.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public enum BodyPartCompatibility
+    {
+        Universal = 0,
+        Biological,
+        Mechanical
+    }
+}