refactor: split common/nixos.nix and -/home.nix

Split these big files into modular files that
are easier to share and read on their own.

profiles/common/nixos/default.nix

@@ -0,0 +1,33 @@
+{ ... }:
+{
+  imports = [
+    ./xserver.nix
+    ./users.nix
+    ./env.nix
+    ./stylix.nix
+    ./polkit.nix
+    ./gc.nix
+    ./store.nix
+    ./systemd.nix
+    ./network.nix
+    ./time.nix
+    ./hardware.nix
+    ./sops.nix
+    ./packages.nix
+    ./programs.nix
+    ./zsh.nix
+    ./syncthing.nix
+    ./blueman.nix
+    ./networkdevices.nix
+    ./gvfs.nix
+    ./interceptiontools.nix
+    ./hardwarecompatibility.nix
+    ./login.nix
+  ];
+
+
+  home-manager = {
+    useGlobalPkgs = true;
+    useUserPackages = true;
+  };
+}