refactor(sydnix-cli): rewrite sydnix-cli

holy shit. why. why did i write the first version LOL. so fucking ocmplicated. and half broken.

flake.nix

@@ -7,7 +7,6 @@
     impermanence.url = "github:nix-community/impermanence";
     home-manager.url = "github:nix-community/home-manager";
     sops-nix.url = "github:Mic92/sops-nix";
-    sydnix-cli.url = "path:///persist/dots/scripts/sydnix-cli";
     copyparty = {
       url = "github:9001/copyparty";
       inputs.nixpkgs.follows = "nixpkgs";