Exclude the playgrounds from biome

Author: nedtwigg

browser-extension/biome.json

@@ -10,7 +10,7 @@
   },
   "files": {
     "ignoreUnknown": false,
-    "includes": [".*", "src/**", "tests/**", "!src/overtype"]
+    "includes": [".*", "src/**", "tests/**", "!src/overtype", "!src/playgrounds"]
   },
   "formatter": {
     "enabled": true,