Revert biome rework (#38724)

* Revert "Fix world generation (#38713)"

This reverts commit 10fa6ff4af.

* Revert "Biome rework (#37735)"

This reverts commit fe7b96147c.

Content.Shared/Procedural/PostGeneration/DungeonEntranceDunGen.cs

@@ -0,0 +1,24 @@
+using Content.Shared.EntityTable;
+using Content.Shared.Maps;
+using Content.Shared.Storage;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.Procedural.PostGeneration;
+
+/// <summary>
+/// Selects [count] rooms and places external doors to them.
+/// </summary>
+public sealed partial class DungeonEntranceDunGen : IDunGenLayer
+{
+    /// <summary>
+    /// How many rooms we place doors on.
+    /// </summary>
+    [DataField]
+    public int Count = 1;
+
+    [DataField(required: true)]
+    public ProtoId<ContentTileDefinition> Tile;
+
+    [DataField(required: true)]
+    public ProtoId<EntityTablePrototype> Contents;
+}