🧹 清理重复配置文件

- 删除根目录中重复的 NestJS 配置文件
- 删除 tsconfig.json, tsconfig.build.json, eslint.config.mjs, .prettierrc
- 保留 wwjcloud-nest/ 目录中的完整配置
- 避免配置冲突，确保项目结构清晰

admin-vben/internal/node-utils/src/index.ts

@@ -0,0 +1,19 @@
+export * from './constants';
+export * from './date';
+export * from './fs';
+export * from './git';
+export { getStagedFiles, add as gitAdd } from './git';
+export { generatorContentHash } from './hash';
+export * from './monorepo';
+export { toPosixPath } from './path';
+export { prettierFormat } from './prettier';
+export * from './spinner';
+export type { Package } from '@manypkg/get-packages';
+export { default as colors } from 'chalk';
+export { consola } from 'consola';
+export * from 'execa';
+
+export { default as fs } from 'node:fs/promises';
+
+export { type PackageJson, readPackageJSON } from 'pkg-types';
+export { rimraf } from 'rimraf';