Microsoft dotnet (.net core) on the environments

Question

Could anyone explain why Microsoft .NET (née dotnet core) isn't included in the list of frameworks for an environment in Codex?

It's been cross-platform for almost 10 years now and is fairly straight forward to install on Ubuntu:

```
wget https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
rm packages-microsoft-prod.deb

sudo apt-get update
sudo apt-get install -y dotnet-sdk-9.0
```