refactor: pull out systems

nixos/system/devvm-hemar/default.nix

@@ -0,0 +1,17 @@
+{
+  flake,
+  self,
+  inputs,
+  system,
+  ...
+}: let
+  # Use folder name as name of this system
+  name = builtins.baseNameOf ./.;
+
+in self.lib.nixpkgs-lib.nixosSystem {
+  inherit (self.legacyPackages."${system}") pkgs;
+  modules = [
+    { networking.hostName = name; }
+    (import ./${name}.nix { inherit flake self inputs; })
+  ];
+}