feat: add initial People Playground mod development kit

extracted_wiki_content/code_snippets.txt

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+URL: https://wiki.studiominus.nl/snippets.html
+Title: People Playground Modding - Code snippets
+==================================================
+
+Code snippets
+These articles explain and show snippets of code that may be useful to you. Alternatively, you can view the repository directly.
+
+Cartridges
+
+Materials
+
+Particle effects
+
+Physical properties
+
+Spawnable items
+
+Activation action
+
+Random sprite assignment
+
+Creating a background script
+
+Change environment settings
+
+Create an explosion
+
+Creating a light
+
+Custom human sprite
+
+Debug drawing
+
+Editing pre-existing items
+
+Empty entry point
+
+Listen for events
+
+Map IDs
+
+Registering an item
+
+Adding a firearm
+
+Spawn particles on activation
+
+Basic texture pack system