♻️ refactor: Convert glossary from JSON to Markdown table format (#11237)

* ♻️ refactor: Convert glossary from JSON to Markdown table format

- Migrate glossary.json to docs/glossary.md with table format
- Update .i18nrc.js to read glossary from Markdown file
- Add more terminology entries (agentGroup, thread)
- Improve readability with structured table layout

* update i18n

* update glossary

* 🐛 fix: fix file type

.i18nrc.js

@@ -1,4 +1,6 @@
 const { defineConfig } = require('@lobehub/i18n-cli');
+const fs = require('fs');
+const path = require('path');
 
 module.exports = defineConfig({
   entry: 'locales/en-US',
@@ -31,8 +33,8 @@ module.exports = defineConfig({
   },
   markdown: {
     reference:
-      '你需要保持 mdx 的组件格式，输出文本不需要在最外层包裹任何代码块语法。以下是一些词汇的固定翻译：\n' +
-      JSON.stringify(require('./glossary.json'), null, 2),
+      '你需要保持 mdx 的组件格式，输出文本不需要在最外层包裹任何代码块语法。\n' +
+      fs.readFileSync(path.join(__dirname, 'docs/glossary.md'), 'utf-8'),
     entry: ['./README.zh-CN.md', './contributing/**/*.zh-CN.md', './docs/**/*.zh-CN.mdx'],
     entryLocale: 'zh-CN',
     outputLocales: ['en-US'],