DungeonData rework (#37172)

* DungeonData rework

Back to fields, serializes better, just make new layers dumby.

* wawawewa

* Fix this

* Fixes

* review

* thanks fork

* fix

Content.Shared/Procedural/PostGeneration/WallMountDunGen.cs

@@ -1,3 +1,8 @@
+using Content.Shared.EntityTable;
+using Content.Shared.Maps;
+using Content.Shared.Storage;
+using Robust.Shared.Prototypes;
+
 namespace Content.Shared.Procedural.PostGeneration;
 
 /// <summary>
@@ -10,4 +15,10 @@ public sealed partial class WallMountDunGen : IDunGenLayer
     /// </summary>
     [DataField]
     public double Prob = 0.1;
+
+    [DataField(required: true)]
+    public ProtoId<ContentTileDefinition> Tile;
+
+    [DataField(required: true)]
+    public ProtoId<EntityTablePrototype> Contents;
 }