Add Nix Dev environment for easier reproducible dev envs

[tonybutt]

Is there an existing issue or pull request for this?

• I have searched the existing issues and pull requests

Feature description

I would like to just type nix develop to begin contributing and get parity with CI and other devs. By defining the dependencies of this project in a flake you could ensure everyone on any OS is building as the project expects.

Will submit a draft PR for testing.

Desired solution

Use Nix

Alternatives considered

None

Additional context

No response

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[orhun]

Unfortunately I don't have experience with Nix but I'm totally fine with it if anyone wants to add it.

[orhun]

Added in #918 - it would be also nice if we test the Nix builds in the GitHub Actions CI (similar to orhun/binsider#75)