feat: enable slash menu by default (#939)

packages/data-center/src/utils/index.ts

@@ -10,6 +10,7 @@ export const createBlocksuiteWorkspace = (
 ) => {
   return new BlocksuiteWorkspace({
     room: workspaceId,
+    defaultFlags: { enable_slash_menu: true },
     ...workspaceOption,
   })
     .register(builtInSchemas)