feat(grfn/system): Resuscitate roswell

Resuscitate the configuration for roswell, the semi-portable
configuration I use for ec2 development boxes. Lots of the changes here
are trying to get Tramp working.

Change-Id: I2dc2fd1d9aa76e145fa3f3f847af761cb652ab47
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5798
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/grfn/system/home/modules/desktop.nix

@@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+
+# Things that only work in the presence of a linux desktop environment
+
+{
+  imports = [
+    ./i3.nix
+    ./obs.nix
+    ./games.nix
+  ];
+
+  home.packages = with pkgs; [
+    ntfy
+  ];
+
+  programs.zsh.initExtra = ''
+    eval "$(${pkgs.ntfy}/bin/ntfy shell-integration)"
+  '';
+
+  services.syncthing.tray.enable = true;
+
+  gtk = {
+    enable = true;
+    gtk3.bookmarks = [
+      "file:///home/grfn/code"
+      "file:///home/grfn/notes"
+    ];
+  };
+}