Data-oriented Construction System (#2152)

- Powerful
- Data-oriented
- Approved by PJB
- Powered by node graphs and AI pathfinding
- Coded by the same nerd who brought you atmos

Co-authored-by: Exp <theexp111@gmail.com>

Content.Server/Construction/Completions/SnapToGrid.cs

@@ -0,0 +1,29 @@
+#nullable enable
+using System.Threading.Tasks;
+using Content.Server.Utility;
+using Content.Shared.Construction;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects.Components.Transform;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Construction.Completions
+{
+    [UsedImplicitly]
+    public class SnapToGrid : IGraphAction
+    {
+        public SnapGridOffset Offset { get; private set; } = SnapGridOffset.Center;
+
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x => x.Offset, "offset", SnapGridOffset.Center);
+        }
+
+        public async Task PerformAction(IEntity entity, IEntity? user)
+        {
+            if (entity.Deleted) return;
+
+            entity.SnapToGrid(Offset);
+        }
+    }
+}