🧹 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/.gitattributes

@@ -0,0 +1,11 @@
+# https://docs.github.com/cn/get-started/getting-started-with-git/configuring-git-to-handle-line-endings
+
+# Automatically normalize line endings (to LF) for all text-based files.
+* text=auto eol=lf
+
+# Declare files that will always have CRLF line endings on checkout.
+*.{cmd,[cC][mM][dD]} text eol=crlf
+*.{bat,[bB][aA][tT]} text eol=crlf
+
+# Denote all files that are truly binary and should not be modified.
+*.{ico,png,jpg,jpeg,gif,webp,svg,woff,woff2} binary