move all expressions to nix/; include modularized home-manager config

nix/tests/buildvmwithbootloader/configuration.nix

@@ -0,0 +1,38 @@
+{ pkgs, lib, ... }:
+let
+
+in
+
+{
+  boot.loader.grub = {
+    enable = true;
+    version = 2;
+    device = "/dev/vda";
+    efiSupport = true;
+    enableCryptodisk = true;
+  };
+  boot.loader.efi.canTouchEfiVariables = true;
+  boot.loader.systemd-boot.enable = true;
+
+  boot.initrd.luks.devices = [ {
+      name = "crypt";
+      device = "/dev/disk/uuid/463d886d-7dfe-421b-8cef-f9af3a3fa09d";
+      preLVM = true;
+      allowDiscards = true;
+    }
+  ];
+  fileSystems."/" = {
+      label = "root";
+  };
+
+  fileSystems."/boot" = {
+      label = "boot";
+  };
+
+  boot.tmpOnTmpfs = true;
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
+  
+  users.extraUsers.root.initialPassword = lib.mkForce "toorroot";
+  users.mutableUsers = false;
+}