feat: add initial People Playground mod development kit

extracted_wiki_content/details/metadata.txt

@@ -0,0 +1,33 @@
+URL: https://wiki.studiominus.nl/details/meta.html
+Title: People Playground Modding - Metadata
+==================================================
+
+Metadata
+Every mod has a metadata file. Metadata files describe information about the mod itself. The file looks something like this:
+{
+  "Name": "No gore mod",
+  "Author": "ActualHuman32",
+  "Description": "This mod adds cool beans",
+  "ModVersion": "1.0",
+  "GameVersion": "1.8.1",
+  "ThumbnailPath": "thumb.png",
+  "EntryPoint": "Mod.Mod",
+  "Tags": [
+    "Fun"
+  ],
+  "Scripts": [
+    "script.cs"
+  ]
+}
+
+Name is the mod name.
+Author is the mod creator.
+Description describes the mod.
+ModVersion is the version of the mod.
+GameVersion is the game version this mod was intended for.
+ThumbnailPath is the relative path to the thumbnail image.
+Tags is an array of strings that indicate what to categorise it by on the Workshop.
+EntryPoint is the C# location of the mod entry point.
+Scripts is an array of file paths that tell the mod loader what files to include. This is relative to the json file.
+
+There is an online generator available here.