feat: 班级小助手 阶段1-3（monorepo + 后端 REST/Socket.IO + Web 管理端）

.prettierrc.json

@@ -0,0 +1,11 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "printWidth": 110,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "arrowParens": "always",
+  "endOfLine": "lf",
+  "vueIndentScriptAndStyle": false,
+  "htmlWhitespaceSensitivity": "ignore"
+}