feat: add broad cast channel provider (#1237)

apps/web/preset.config.mjs

@@ -2,5 +2,8 @@ import 'dotenv/config';
 
 export default {
   enableIndexedDBProvider: Boolean(process.env.ENABLE_IDB_PROVIDER ?? '1'),
+  enableBroadCastChannelProvider: Boolean(
+    process.env.ENABLE_BC_PROVIDER ?? '1'
+  ),
   prefetchWorkspace: Boolean(process.env.PREFETCH_WORKSPACE ?? '1'),
 };