update hardware generation in template

templates/generic/.envrc

@@ -0,0 +1 @@
+use flake

templates/generic/nix-modules/packages/boilerplate/boilerplate.py

@@ -64,6 +64,7 @@ def host_templates(name: str) -> dict[Path, str]:
                       imports = [
                         self.nixosModules.{name}Hardware
                       ];
+                      system.stateVersion = "25.11";
                     }};
                 }}
                 """
@@ -77,7 +78,17 @@ def host_templates(name: str) -> dict[Path, str]:
                     {{ lib, pkgs, ... }}:
                     {{
                       config = {{
-                        # Copy the generated hardware configuration here.
+                        # If you're building a full system here, you'd likely want to just copy the hardware
+                        # configuration generated by the NixOS installer. I've added some stuff here just so
+                        # `nix flake check` passes on initialization of the flake and to show how it _could_
+                        # look. You can find it here: `/etc/nixos/hardware-configuration.nix`
+
+                        boot.loader.grub.devices = [ "/dev/sda" ];
+
+                        fileSystems."/" = {{
+                          device = "tmpfs";
+                          fsType = "tmpfs";
+                        }};
                       }};
                     }};
                 }}