refactor: Epistemic shift from MUD to Spatial Research Environment

spatial_engine/world/README.md

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+# world/
+
+This folder is meant as a miscellaneous folder for all that other stuff
+related to the game. Code which are not commands or typeclasses go
+here, like custom economy systems, combat code, batch-files etc. 
+
+You can restructure and even rename this folder as best fits your
+sense of organisation. Just remember that if you add new sub
+directories, you must add (optionally empty) `__init__.py` files in
+them for Python to be able to find the modules within.