Core Supermatter (Simple-Station#792)

# Description

**Walks into a room**
**Slaps down CORE, but with Supermatter**
**Doesn't elaborate**
**Leaves**

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<details><summary><h1>Media</h1></summary>
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![Core-0](https://github.com/user-attachments/assets/4fbb8e6d-b4b8-4c73-b048-7349711a624a)


![image](https://github.com/user-attachments/assets/d5c37ac8-e500-404e-a0ad-520a68ca6d8e)

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# Changelog

:cl:
- add: Core has been added to the list of maps in rotation. This time
featuring a custom Supermatter Engine

Content.IntegrationTests/Tests/PostMapInitTest.cs

@@ -49,6 +49,7 @@ public sealed class PostMapInitTest
             "CentComm",
             "MeteorArena",
             "NukieOutpost",
+            "Core",
             "Pebble", //DeltaV
             "Edge", //DeltaV
             "Saltern",