feat: Initial NixOS systems config for laptop

hosts/default.nix

@@ -0,0 +1,86 @@
+{ inputs, hostName, system ? "x86_64-linux" }:
+
+let
+  nixpkgs      = inputs.nixpkgs;
+  home-manager = inputs.home-manager;
+  disko        = inputs.disko;
+
+  lib = nixpkgs.lib;
+
+  commonModules = [
+    ../boot.nix
+    ../net.nix
+    ../sw.nix
+    ../users
+    home-manager.nixosModules.home-manager
+    disko.nixosModules.disko
+    ({ ... }: {
+      disko.enableConfig = true;
+
+      disko.devices = {
+        disk.main = {
+          type = "disk";
+
+          device = lib.mkDefault "/dev/nvme0n1";
+
+          content = {
+            type = "gpt";
+            partitions = {
+              ESP = {
+                name = "ESP";
+                label = "BOOT";
+                size = "1G";
+                type = "EF00";
+                content = {
+                  type = "filesystem";
+                  format = "vfat";
+                  mountpoint = "/boot";
+                  mountOptions = [ "umask=0077" ];
+                  extraArgs = [ "-n" "BOOT" ];
+                };
+              };
+
+              swap = {
+                name = "swap";
+                label = "swap";
+                size = "34G";
+                content = {
+                  type = "swap";
+                };
+              };
+
+              root = {
+                name = "root";
+                label = "root";
+                size = "100%";
+                content = {
+                  type = "filesystem";
+                  format = "ext4";
+                  mountpoint = "/";
+                  extraArgs = [ "-L" "ROOT" ];
+                };
+              };
+            };
+          };
+        };
+      };
+    })
+  ];
+
+  # Map hostnames to their per-host module
+  hostModules = {
+    nix-laptop1 = ./nix-laptop1.nix;
+  };
+in
+lib.nixosSystem {
+  inherit system;
+
+  specialArgs = { inherit inputs; };
+
+  modules =
+    commonModules
+    ++ [ (hostModules.${hostName} or (throw "Unknown host '${hostName}' in hosts/default.nix")) ]
+    ++ [
+      { networking.hostName = hostName; }
+    ];
+}

hosts/nix-laptop1.nix

@@ -0,0 +1,15 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "nvme" "usb_storage" "sd_mod" "sdhci_pci" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}