user: add qml formatter for zed

zed/settings.json

@@ -19,6 +19,17 @@
   "languages": {
     "Nix": {
       "language_servers": ["nixd", "!nil"]
+    },
+    "QML": {
+      "formatter": {
+        "external": {
+          "command": "sh",
+          "arguments": [
+            "-c",
+            "tmp=$(mktemp --suffix .qml); cat > $tmp; qmlformat $tmp"
+          ]
+        }
+      }
     }
   },
   "lsp": {