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/unstable/icdm-root/hardware-configuration.nix

@@ -0,0 +1,53 @@
+# 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.
+{
+  config,
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+
+  boot.initrd.availableKernelModules = [
+    "xhci_pci"
+    "ehci_pci"
+    "ahci"
+    "usbhid"
+    "usb_storage"
+    "sd_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/dab0d455-e25e-4445-8fa4-5320047d7e7b";
+    fsType = "btrfs";
+    options = [ "subvol=@" ];
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/5aedbb07-5761-423b-909d-2560405eae32";
+    fsType = "ext4";
+  };
+
+  fileSystems."/var" = {
+    device = "/dev/disk/by-uuid/57968536-c29d-417d-997e-85223d1d1f65";
+    fsType = "btrfs";
+  };
+
+  swapDevices = [ { device = "/dev/disk/by-uuid/09691dce-375a-43c6-8d40-4498d20a6d9a"; } ];
+
+  # 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.eno1.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlp2s0.useDHCP = lib.mkDefault true;
+
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}