fix: simplify Zed settings to avoid config error

- Remove invalid formatter configuration
- Keep basic CSS language settings
- Avoids 'FormatterList' enum error in Zed

.zed/settings.json

@@ -1,14 +1,8 @@
 {
-  "linter": {
-    "css": {
-      "disabled": ["unknownAtRules"]
-    }
-  },
-  "formatter": {
-    "language": {
-      "CSS": {
-        "unknownAtRules": "ignore"
-      }
+  "languages": {
+    "CSS": {
+      "tab_size": 2,
+      "formatter": "none"
     }
   }
 }