Center align images and badges in README

The images and badges in the README file have been aligned to the center for aesthetic improvement. Additionally, the width parameters of a couple of badges have been adjusted to fit them perfectly within the newly center-aligned format. A "work in progress" note has also been removed.

README.md

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 [![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/pipeline.svg?job=pytest&key_text=Main+Pipeline&key_width=82)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/coverage.svg?job=pytest&key_text=Main+Coverage&key_width=86)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/coverage.svg?job=pytest&key_text=Main+Coverage&key_width=90)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
 [![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/pipeline.svg?job=pytest&key_text=Dev+Pipeline&key_width=80)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/coverage.svg?job=pytest&key_text=Dev+Coverage&key_width=84)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/coverage.svg?job=pytest&key_text=Dev+Coverage&key_width=86)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
+</div>
 
 # Cooperative Cuisine Environment
 
 [Documentation](https://scs.pages.ub.uni-bielefeld.de/cocosy/overcooked-simulator)
 
 The overcooked-like cooperative cuisine environment for real-time human cooperative interactions and artificial agents.
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-**The name ist still work in progress and we will probably change it.**
+<div align="center">
+<img src="cooperative_cuisine/pygame_2d_vis/images/cooperative_cuisine.png"  width="800">
+</div>
 
 ## Installation