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

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

Content.IntegrationTests/Tests/CargoTest.cs

@@ -74,6 +74,7 @@ public sealed class CargoTest
 
             var protoIds = protoManager.EnumeratePrototypes<EntityPrototype>()
                 .Where(p=>!p.Abstract)
+                .Where(p => !p.Components.ContainsKey("MapGrid")) // Grids are not for sale.
                 .Select(p => p.ID)
                 .ToList();