Adding aarch64-linux architecture support

[NicolasGuilloux]

Adding the aarch64-linux architecture for the Tarball build in the workflow actions.
Fixes #7

[tfc]

Hey @NicolasGuilloux i updated to nixos-unstable, picked up your readme changes, but did the .github/workflows file change slightly differently and merged them to main. please let me know if i'm missing out anything. :)

[NicolasGuilloux]

I rebased it.
But you did copy manually and partially the changes I made to support the aarch64 apparently.
Nonetheless there are some changes that are required to make it work, especially the extra_nix_config

Moreover, I think I fixed an issue since you are building the tarball with nixos-unstable, but specifying nixos-23.11 for the generated configuration.nix file.

[tfc]

You're right, i forgot to fix the flake input on the inner flake template file.

However, i don't understand why you remove the caching parts in the github workflow description.

[tfc]

and i see that somehow the "co-authored" line vanished when i cherry-picked your readme changes. this seems to be my fault. i can rebase with a corrected git commit message if you like.

[NicolasGuilloux]

No I don't mind, it is just more simple to simply ask for changes and click on Merge ^^
True for the caching part, I failed to remember why I removed it. Let me try with it then.

[NicolasGuilloux]

I found the option for the DeterminatesSystems action to support aarch64 build. The cache wasn't working properly with the cachix thing.
Everything should work well now, you can merge