Dynamic space world generation and debris. (#15120)

* World generation (squash)

* Test fixes.

* command

* o

* Access cleanup.

* Documentation touchups.

* Use a prototype serializer for BiomeSelectionComponent

* Struct enumerator in SimpleFloorPlanPopulatorSystem

* Safety margins around PoissonDiskSampler, cookie acquisition methodologies

* Struct enumerating PoissonDiskSampler; internal side

* Struct enumerating PoissonDiskSampler: Finish it

* Update WorldgenConfigSystem.cs

awa

---------

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>
Co-authored-by: 20kdc <asdd2808@gmail.com>

Content.Server/Worldgen/Components/Debris/SimpleDebrisSelectorComponent.cs

@@ -0,0 +1,34 @@
+using Content.Server.Worldgen.Systems.Debris;
+using Content.Server.Worldgen.Tools;
+using Content.Shared.Storage;
+
+namespace Content.Server.Worldgen.Components.Debris;
+
+/// <summary>
+///     This is used for a very simple debris selection for simple biomes. Just uses a spawn table.
+/// </summary>
+[RegisterComponent]
+[Access(typeof(DebrisFeaturePlacerSystem))]
+public sealed class SimpleDebrisSelectorComponent : Component
+{
+    private EntitySpawnCollectionCache? _cache;
+
+    /// <summary>
+    ///     The prototype-facing debris table entries.
+    /// </summary>
+    [DataField("debrisTable", required: true)]
+    private List<EntitySpawnEntry> _entries = default!;
+
+    /// <summary>
+    ///     The debris entity spawn collection.
+    /// </summary>
+    public EntitySpawnCollectionCache CachedDebrisTable
+    {
+        get
+        {
+            _cache ??= new EntitySpawnCollectionCache(_entries);
+            return _cache;
+        }
+    }
+}
+