Shuttle docking (#5169)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Shared/Shuttles/SharedDockingComponent.cs

@@ -0,0 +1,18 @@
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Shared.Shuttles
+{
+    public abstract class SharedDockingComponent : Component
+    {
+        // Yes I left this in for now because there's no overhead and we'll need a client one later anyway
+        // and I was too lazy to delete it.
+        public override string Name => "Docking";
+
+        [ViewVariables]
+        public bool Enabled = false;
+
+        public abstract bool Docked { get; }
+    }
+}