Consolidated and moved modules/{nixos,darwin} to modules/system

modules/system/common/default.nix

@@ -0,0 +1,56 @@
+{isLinux}: {
+  config,
+  configurationName,
+  lib,
+  pkgs,
+  ...
+}: let
+  sharedConfig = {
+    settei.user.config = {
+      programs.git = {
+        enable = true;
+        difftastic.enable = true;
+        lfs.enable = true;
+        userName = "Nikodem Rabuliński";
+        userEmail = lib.mkDefault "nikodem@rabulinski.com";
+        signing = {
+          key = config.settei.sane-defaults.allSshKeys.${configurationName};
+          signByDefault = true;
+        };
+        extraConfig = {
+          gpg.format = "ssh";
+          push.followTags = true;
+        };
+      };
+    };
+  };
+
+  linuxConfig = lib.optionalAttrs isLinux {
+    system.stateVersion = "22.05";
+
+    # https://github.com/NixOS/nixpkgs/issues/254807
+    boot.swraid.enable = false;
+
+    i18n.defaultLocale = lib.mkDefault "en_US.UTF-8";
+
+    settei.user.config = {
+      services.ssh-agent.enable = true;
+    };
+  };
+
+  darwinConfig = lib.optionalAttrs (!isLinux) {
+    system.stateVersion = 4;
+  };
+in {
+  _file = ./default.nix;
+
+  imports = [
+    (import ./hercules.nix {inherit isLinux;})
+  ];
+
+  config = lib.mkMerge [
+    sharedConfig
+    linuxConfig
+    darwinConfig
+  ];
+}