Create shell.nix

[DewJunkie]

Add shell.nix to install dart2 and zulu, nix will already have a c compiler

[DewJunkie]

I'm not sure if this is interesting or not, but the idea is that the build becomes batteries included on nix. I ended up creating it, because when I installed dart, it was 3.x, and every time I have to figure out how to install an older version of something, I end up re-learning how. If we wanted to take it all the way, then it could be made into a Pure shell, and all the dependencies (besides what is in "make get") would need to be specified. Taking it even further, but I think that would be a step back for other platforms, would be to include everything that make get does.

[bernborgess]

Looks good! Thanks for the contribution! It would be better if we could patch it to be null-safe tho...

[DewJunkie]

ok, I'll work on that, I'll also update this script to that is works with
nix-shell --pure.
I'll try and work on the null-safety for Dart3.

[bernborgess]

ok, I'll work on that, I'll also update this script to that is works with
nix-shell --pure.
I'll try and work on the null-safety for Dart3.

Cool, want any help with that? Docs should explain what to do, but I don't know if it's a lot or just a couple changes