chore: disable outline, copilot and hello world plugin (#4894)

packages/common/env/src/global.ts

@@ -16,6 +16,7 @@ export const blockSuiteFeatureFlags = z.object({
 
 export const runtimeFlagsSchema = z.object({
   enablePlugin: z.boolean(),
+  builtinPlugins: z.array(z.string()),
   enableTestProperties: z.boolean(),
   enableBroadcastChannelProvider: z.boolean(),
   enableDebugPage: z.boolean(),