[enhancement]: package for nix/NixOS

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Contact Details

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### What should this feature add?

Would be great is InvokeAI was added to [nixpkgs](https://github.com/NixOS/nixpkgs) so that users of nix and NixOs could easily install it. In fact this would benefit all linux users as they could install nix on their distro and get a working copy of invokeai this way

I see you already have a deveploment flake.nix, but that builds everything from scratch, while adding to nixpkgs would benefit from from their binary cache

### Alternatives

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### Additional Content

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