feat: add agenix module

flake.nix

···
     };
 
     easy-hosts.url = "github:tgirlcloud/easy-hosts";
+
+    agenix.url = "github:ryantm/agenix";
   };
 
-  outputs = { self, nixpkgs, home-manager, ... } @ inputs:
+  outputs = { self, nixpkgs, home-manager, agenix, ... } @ inputs:
     let 
       system = "x86_64-linux";
       #pkgs-unstable = import nixpkgs-unstable {inherit system; config.allowUnfree = true; };
···
                 ./home/testificate
               ];
             })
+
+            agenix.nixosModules.default
+
+            { environment.systemPackages = [ agenix.packages.${system}.default ]; }
 
           ];
 

secrets/secrets.nix

···
+let
+  emily = "";
+  users = [ emily ];
+
+  emerald = "";
+  quartz = "";
+  systems = "";
+in
+{
+  "secret1.age".publicKeys = users ++ systems;
+}