feat(filesystems): add helios data smb share over tailscale

hosts/nemesis.nix

@@ -9,4 +9,5 @@
   hardware-config.cpu = "amd";
   hardware-config.gpu = "nvidia";
   gaming.steam.enable = true;
+  fs-config.mountHeliosData = true;
 }

modules/nixos/default.nix

@@ -13,6 +13,7 @@ in
     ./hardware.nix
     ./nix-config.nix
     ./gaming.nix
+    ./filesystems.nix
   ];
 
   options = {

modules/nixos/filesystems.nix

@@ -0,0 +1,25 @@
+{
+  config,
+  lib,
+  ...
+}:
+let
+  moduleName = "fs-config";
+  cfg = config."${moduleName}";
+in
+{
+  options = {
+    "${moduleName}" = {
+      mountHeliosData = lib.mkEnableOption "Mount helios SMB share to /media/helios/data.";
+    };
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf cfg.mountHeliosData {
+      fileSystems."/media/helios/data" = {
+        device = "//helios/data";
+        fsType = "cifs";
+      };
+    })
+  ];
+}