Set up autostart layout for i3

hosts/desktop/i3/default.nix

@@ -0,0 +1,23 @@
+{ ... }:
+
+{
+  xsession.windowManager.i3.config = {
+    startup = [
+      {
+        command = ''i3-msg workspace 1 && (firefox &) && i3-msg "workspace 2; append_layout ${./tree.json}; open" && (for i in {1..4}; do i3-msg move left; done) && (discord &) && firefox --new-window https://youtube.com && i3-msg workspace 1'';
+        always = true;
+        notification = false;
+      }
+    ];
+    workspaceOutputAssign = [
+      {
+        output = "HDMI-0";
+        workspace = "1";
+      }
+      {
+        output = "DVI-D-0";
+        workspace = "2";
+      }
+    ];
+  };
+}