chore: export composeCreateRsbuildConfig as utils

Author: nyqykk

packages/core/src/index.ts

@@ -1,6 +1,6 @@
 export { prepareCli } from './cli/prepare';
 export { runCli } from './cli/commands';
-export { defineConfig, loadConfig } from './config';
+export { defineConfig, loadConfig, composeCreateRsbuildConfig } from './config';
 export { build } from './build';
 export { logger } from './utils/logger';
 export type * from './types';