chore: dynamic hosts, builder targets

Make hosts read from directories, to limit manual changes
Rename vm-gitlab -> gitlab
A few reformatting and lint changes due to altered files
Create builder targets for Darwin builders

hosts/vm/gitlab/hardware-configuration.nix

@@ -0,0 +1,58 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  # Bootloader.
+  boot = {
+    extraModulePackages = [ ];
+    initrd = {
+      availableKernelModules = [
+        "uhci_hcd"
+        "ehci_pci"
+        "ahci"
+        "virtio_pci"
+        "virtio_scsi"
+        "sd_mod"
+        "sr_mod"
+      ];
+      kernelModules = [ ];
+    };
+    loader = {
+      efi.canTouchEfiVariables = true;
+      systemd-boot.enable = true;
+    };
+  };
+
+  fileSystems."/" = {
+    device = lib.mkDefault "/dev/disk/by-uuid/1fdbe86e-ce6f-4af3-a876-aec35731adab";
+    fsType = "ext4";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/1E6A-C3BB";
+    fsType = "vfat";
+    options = [
+      "fmask=0077"
+      "dmask=0077"
+    ];
+  };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp6s18.useDHCP = lib.mkDefault true;
+}