feat: add initial People Playground mod development kit

extracted_wiki_content/internalReference/map.txt

@@ -0,0 +1,36 @@
+URL: https://wiki.studiominus.nl/internalReference/Map.html
+Title: People Playground Modding - Map
+==================================================
+
+public class Map
+Inherits ScriptableObject
+[CreateAssetMenu(menuName = "PPG/Map")]
+A map
+Fields
+public string UniqueIdentity
+[ContextMenuItem("Regenerate identity", nameof(RegenerateIdentity))]
+A globally unique identity. Automatically generated.
+
+public string Description
+[Multiline]
+Short description of the map.
+
+public string Author
+Name of the creator of the map.
+
+public Sprite Thumbnail
+Thumbnail of the map 512x512
+
+public Sprite Preview
+Large preview image of the map.
+
+public GameObject Prefab
+[Space]
+Reference to the prefab of the map to instantiate. This can be null if the InstantiateOverride delegate isn't null
+
+public MapInternals EditorMapAssembly
+Used to assemble an editor map into a fully functional map
+
+public Action<Transform> InstantiateOverride
+[System.NonSerialized]
+If not null, the map loader will use this function instead of Prefab