feat(luna): add initial luna config

hosts/luna/default.nix

@@ -0,0 +1,9 @@
+{ config, lib, nixpkgs, ... }:
+
+{
+  imports = [
+    ./modules
+    ./os/filesystem.nix
+  ];
+  system.stateVersion = "23.11";
+}

hosts/luna/modules/default.nix

@@ -0,0 +1,7 @@
+{ config, pkgs, lib, ... }:
+
+{
+  # imports = [ ];
+  # ...
+  # TODO: Actually get these configs in place
+}

hosts/luna/os/filesystem.nix

@@ -0,0 +1,72 @@
+{ config, lib, pkgs, modulesPath, ... }:
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix") ];
+
+  boot = {
+    initrd = {
+      availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+      kernelModules = [ ];
+    };
+    loader = {
+      systemd-boot.enable = true;
+      efi.canTouchEfiVariables = true;
+    };
+    kernelModules = [ "kvm-intel" ];
+    extraModulePackages = [ ];
+  };
+
+  swapDevices = [{ device = "/dev/disk/by-label/NixOS-Swap"; }];
+
+  fileSystems = {
+    "/" = {
+      device = "none";
+      fsType = "tmpfs";
+      options = [ "defaults" "noatime" "mode=755" ];
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-label/NixOS-Boot";
+      fsType = "vfat";
+      options = [ "defaults" "noatime" ];
+      depends = [ "/" ];
+    };
+
+    "/nix" = {
+      device = "/dev/disk/by-label/NixOS-Primary";
+      fsType = "btrfs";
+      options = [ "subvol=@nix" "compress=zstd" "noatime" ];
+    };
+  };
+
+
+  environment.persistence = {
+    "/nix/persist" = {
+      hideMounts = true;
+      directories = [
+        "/var/lib"
+        "/var/log"
+        "/etc/nixos"
+      ];
+      files = [
+        "/etc/machine-id"
+        "/etc/nix/id_rsa"
+      ];
+      users.price = {
+        directories = [
+          "Git"
+          "ISOs"
+          "Downloads"
+          "Keep"
+          "Notes"
+          ".local/share"
+          { directory = ".gnupg"; mode = "0700"; }
+          { directory = ".ssh"; mode = "0700"; }
+        ];
+        files = [
+          ".zsh_history"
+        ];
+      };
+    };
+  };
+}