feat: add nixos configuration

nixos/hosts/nixos/default.nix

@@ -0,0 +1,17 @@
+{ ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../../modules/desktop.nix
+    ../../modules/hardware.nix
+    ../../modules/packages
+    ../../modules/system.nix
+    ../../modules/users.nix
+  ];
+
+  networking.hostName = "nixos";
+
+  # Keep this at the version used during the initial installation.
+  system.stateVersion = "26.05";
+}

nixos/hosts/nixos/hardware-configuration.nix

@@ -0,0 +1,37 @@
+# Generated by nixos-generate-config. Keep machine-specific settings here.
+{ config, lib, modulesPath, ... }:
+
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [
+    "ahci"
+    "nvme"
+    "xhci_pci"
+    "usb_storage"
+    "usbhid"
+    "sd_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-amd" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/bc9b799b-3c14-419b-b3f5-88ff212bb1f4";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/D846-0839";
+    fsType = "vfat";
+    options = [ "fmask=0022" "dmask=0022" ];
+  };
+
+  swapDevices = [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode =
+    lib.mkDefault config.hardware.enableRedistributableFirmware;
+}