Setup Development env using Nix and Flakes

[shekohex]

Summary of changes

• Adds nix flakes
• Auto Setups a development env with Rust and Nodejs
• No functional, nor code changes

PS: I started using Nix & NixOS and this super cool actually and I would recommend you try it too.

Reference issue to close (if applicable)

• Closes None

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Code Checklist

• [ ] Tested
• [ ] Documented