Add integration matrix on splash page

Suggestion by Alex:

<img width="524" alt="Screenshot 2023-01-15 at 10 17 49" src="https://user-images.githubusercontent.com/109058/212532968-655024b3-c6a5-47b1-91e8-72ab1108cf69.png">

Maybe remove the version numbers to keep it clean and remove any update-hassle.