Move useless partials as modules

hosts/nixos/system/os.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   # System services
@@ -30,6 +30,15 @@
   # Terminal
   programs.ssh.enableAskPassword = false; # No-window git push fix
 
+  environment.systemPackages = with pkgs; [
+    pods
+    zed-editor
+  ];
+
+  services.flatpak.packages = [
+    "io.github.flattool.Warehouse"
+  ];
+
   # System version
   system.stateVersion = "25.11";
 }