✨ (vscode) add upgrade script task

.vscode/tasks.json

@@ -0,0 +1,11 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "flake upgrade",
+      "type": "shell",
+      "command": "tmux new -s flake-update .vscode/upgrade.sh",
+      "problemMatcher": []
+    }
+  ]
+}

.vscode/upgrade.sh

@@ -0,0 +1,14 @@
+# stop on error
+set -euxo pipefail
+
+# update lock file
+nix flake update
+
+# update systems
+sudo nixos-rebuild switch -L --flake .#neodymium
+nixos-rebuild switch -L --flake .#hydrogen --target-host hydrogen
+
+# commit and push lock file
+git add flake.lock
+git commit -m "⬆️ nix flake update"
+git push