Added a Nix flake containing everything needed to build, dev and run …

[MichaelFisher1997]

This is a Nix Flake for NixOS and anyone with nix package manager installed on their system.

It allow people to enter into the flake dev shell as followed:
nix develop and it will install all the listed dependencies to build and run redot avoiding the pain of having to workout what dependencies you need to install and what missing.

[MichaelFisher1997]

might need a get job thats a container with nix that can do the following

nix develop
scons platform=linuxbsd

[MichaelFisher1997]

closed as theoparis still links to this as a reference but that one should be used going forward

[SkogiB]

We working with this one now? We are not sending PRs up to Godot by default at this time, due to a reassessment in the core team, so we can start looking at stuff like this soon.

[MichaelFisher1997]

I spoke to McDubh about adding this one in for now a few days ago so i reopened it.
A lot of people have been asking for it.
I know this one works for NixOS and Nix on other linux distros, the PR that expands on this, has support for things like Mac hardware and Arm so that can be added in a little later down the road.
(I do actually have a couple people With Macs that said they will help and test it)

But yeah theirs no rush on it