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/EntityTable/EntityTableSystem.cs

@@ -9,6 +9,12 @@ public sealed class EntityTableSystem : EntitySystem
     [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
     [Dependency] private readonly IRobustRandom _random = default!;
 
+    public IEnumerable<EntProtoId> GetSpawns(EntityTablePrototype entTableProto, System.Random? rand = null)
+    {
+        // convenient
+        return GetSpawns(entTableProto.Table, rand);
+    }
+
     public IEnumerable<EntProtoId> GetSpawns(EntityTableSelector? table, System.Random? rand = null)
     {
         if (table == null)