🧹 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/.github/workflows/stale.yml

@@ -0,0 +1,19 @@
+name: 'Close stale issues'
+
+on:
+  schedule:
+    - cron: '0 1 * * *'
+
+jobs:
+  stale:
+    if: github.repository == 'vbenjs/vue-vben-admin'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days'
+          stale-pr-message: 'This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days'
+          exempt-issue-labels: 'bug,enhancement'
+          days-before-stale: 60
+          days-before-close: 7