Hooray! I managed to run the game on my MacBook Pro with Apple silicon (13", M1 SoC, Mac OS X 13 Ventura). And it looks like it even works with touchpad really well.
My step by step solution.
Download the game from here. Open Terminal and cd into the game folder
cd ~/Downloads/vintagestory.app/
Download an installer for x64 .NET Runtime from here . I used 7.0.2 because it was the version game was asking for. Do not use arm64
Install .NET runtime
arch -x86_64 sudo installer -pkg dotnet-runtime-7.0.2-osx-x64.pkg -target /
Install Homebrew for x64 (as described here)
Install lib cairo
axbrew install cairo
Copy (symlink) the library into the game folder, basicaly inside 'vintagestory.app'
ln -s /usr/local/homebrew/lib/libcairo.2.dylib libcairo.so.2.dylib
Run the game
arch -x86_64 ./Vintagestory
Have fun!
Alan Schmitt, your way to install Homebrew is also valid, but I prefer not to exec scripts from internet
I will continue testing tomorrow. Probably will try a mouse!