Add Jest extension to VSCode configuration as recommendation

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: alex-rawlings-yyc

.vscode/extensions.json

@@ -4,6 +4,7 @@
     "editorconfig.editorconfig",
     "esbenp.prettier-vscode",
     "streetsidesoftware.code-spell-checker",
-    "stylelint.vscode-stylelint"
+    "stylelint.vscode-stylelint",
+    "Orta.vscode-jest"
   ]
 }