Re-organize all projects (#4166)

Content.Shared/Placeable/SharedPlaceableSurfaceComponent.cs

@@ -0,0 +1,33 @@
+#nullable enable
+using System;
+using Content.Shared.NetIDs;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Placeable
+{
+    public abstract class SharedPlaceableSurfaceComponent : Component
+    {
+        public override string Name => "PlaceableSurface";
+        public override uint? NetID => ContentNetIDs.PLACEABLE_SURFACE;
+        public virtual bool IsPlaceable { get; set; }
+        public virtual bool PlaceCentered { get; set; }
+        public virtual Vector2 PositionOffset { get; set; }
+    }
+
+    [Serializable, NetSerializable]
+    public class PlaceableSurfaceComponentState : ComponentState
+    {
+        public readonly bool IsPlaceable;
+        public readonly bool PlaceCentered;
+        public readonly Vector2 PositionOffset;
+
+        public PlaceableSurfaceComponentState(bool placeable, bool centered, Vector2 offset) : base(ContentNetIDs.PLACEABLE_SURFACE)
+        {
+            IsPlaceable = placeable;
+            PlaceCentered = centered;
+            PositionOffset = offset;
+        }
+    }
+}