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/PoolManager.cs

@@ -57,6 +57,7 @@ public static class PoolManager
         (CCVars.ArrivalsShuttles.Name,        "false"),
         (CCVars.EmergencyShuttleEnabled.Name, "false"),
         (CCVars.ProcgenPreload.Name,          "false"),
+        (CCVars.WorldgenEnabled.Name,         "false"),
         // @formatter:on
     };