modularized all the things

part one (?)

modules/machine/sephiroth/configuration.nix

@@ -167,6 +167,17 @@
 
   system.stateVersion = 5;
 
+  containers.podman = {
+    enable = true;
+    dockerCompat = false;
+    extraPackages = with pkgs; [
+      podman-tui
+      docker-credential-helpers
+      cosign
+      crane
+    ];
+  };
+
   # Set your time zone.
   time.timeZone = "America/Detroit";
 }