feat: v0.2.5 — 内置语法高亮 + exportPDF + benchmark + CI 并行

- 新增 src/highlight.ts 零依赖轻量高亮器：13 种语言，先转义后
  着色保证安全，输出 me-hl-* 类，MeEditor.highlight 即插即用
- exportTool 新增 editor.exportPDF()（隐藏 iframe + window.print），
  exportHTML/exportPDF 共用 HTML 构建逻辑
- imagePaste 支持 maxSizeKB 限制，超限 toast 警告
- npm run bench 性能基准：parseMarkdown 1MB ≈ 51ms
- CI 测试拆分为 parser/core/rest 三个并行 job + 跨版本 verify job
- docs.html/README 补齐新 API、事件、高亮文档；取消跟踪 dist 产物；
  版本 0.2.4 → 0.2.5，测试 725 → 768

build.sh

@@ -61,15 +61,15 @@ echo "✅ 构建成功完成！"
 echo ""
 echo "📁 文件结构:"
 echo "  - dist/metona-editor.js      (UMD格式)"
-echo "  - dist/metona-editor.esm.js  (ES Module格式)"
-echo "  - dist/metona-editor.cjs.js  (CommonJS格式)"
+echo "  - dist/metona-editor.mjs  (ES Module格式)"
+echo "  - dist/metona-editor.cjs  (CommonJS格式)"
 echo "  - dist/metona-editor.min.js  (压缩版本)"
 echo "  - dist/metona-editor.d.ts    (TypeScript声明)"
 echo ""
 echo "🚀 使用方法:"
 echo "  1. 浏览器: <script src='dist/metona-editor.js'></script>"
-echo "  2. ES Module: import MeEditor from 'dist/metona-editor.esm.js'"
-echo "  3. CommonJS: const MeEditor = require('dist/metona-editor.cjs.js')"
+echo "  2. ES Module: import MeEditor from 'dist/metona-editor.mjs'"
+echo "  3. CommonJS: const MeEditor = require('dist/metona-editor.cjs')"
 echo ""
 echo "📝 示例:"
 echo "  打开 site/index.html 查看官网"