Samba Share, Night Light, and Dev Packages

- Add default group with gid 1000
- Add redshift night light to dwm
- Add samba mount nix
- Add openssh and github cli packages

system/utilities/samba.nix

@@ -0,0 +1,34 @@
+{ config, lib, pkgs, userSettings, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    cifs-utils
+    lxqt.lxqt-policykit # provides a default authentification client for policykit
+  ];
+
+  fileSystems."/mnt/fileserver" = {
+    device = "//192.168.12.5/fileserver";
+    fsType = "cifs";
+    options = let
+      # this line prevents hanging on network split
+      automount_opts = "x-systemd.automount,noauto,x-systemd.idle-timeout=60,x-systemd.device-timeout=5s,x-systemd.mount-timeout=5s";
+
+    in [
+      "${automount_opts},
+      credentials=/etc/nixos/smb-secrets,
+      ${config.users.users.${userSettings.username}.uid},
+      gid=${config.users.groups.${userSettings.username}.gid}"
+    ];
+    # Make sure to create `/etc/nixos/smb-secrets` with following content
+    # where domain can be optional
+    # username=<USERNAME>
+    # domain=<DOMAIN>
+    # password=<PASSWORD>
+  };
+
+  # Samba discovery of machines and shares
+  networking.firewall.extraCommands = ''iptables -t raw -A OUTPUT -p udp -m udp --dport 137 -j CT --helper netbios-ns'';
+
+  # GVFS
+  services.gvfs.enable = true;
+}