feat(reader): P2——goja JS 引擎接入 + Go 原生 java.* 桥接

- rule/goja.go：纯 Go JS 运行时（goja），脚本编译缓存 + 超时中断（默认10s），
  绑定集合对齐 legado evalJS（java/cookie/cache/source/book/result/baseUrl/
  chapter/title/src/page/key）
- rule/bridge.go：java 对象函数名与 legado JsExtensions 一一对应（存量书源
  硬编码这些名字），全部 Go 原生实现：
  网络 ajax/ajaxAll/connect/get/post/head（经 MeBox HTTP 客户端，响应对象
  带 body()/code()/url()/header()）；规则回调 getString/getStringList/
  getElements/put/get（桥回当前解析器）；编解码 base64/hex/md5(16/32)/
  digest/HMac/encodeURI/timeFormat（SimpleDateFormat 转 Go 布局）
- 对称加密：createSymmetricCrypto + aes/des/3des 全家桶，transformation
  三段式解析（AES/DES/3DES × CBC/ECB/CTR/OFB/CFB × PKCS5/7/Zero/NoPadding，
  ECB 手工块循环），密钥长度自动补齐，decryptStr 自动识别 Base64/Hex
- get(url,headers) 与 get(key) 按 arity 分发（对齐 Kotlin 重载）
- 浏览器/文件/压缩包类函数明确抛不支持（服务端沙箱边界）
- URL 规则 JS：analyzeJs（@result 链式）、{{js}} 内嵌、option js/bodyJs
- execute 记录 Set-Cookie 进 cookie jar（java/cookie.getCookie 可读）
- 测试：编码/摘要/AES 向量/CBC+ECB 往返/ajax httptest/URL JS/沙箱边界，
  全部通过；修复 java.get 双注册、测试缺 SetContent 与 md5Encode16 期望值

go.sum

@@ -39,6 +39,10 @@ github.com/disintegration/imaging v1.6.3-0.20201218193011-d40f48ce0f09 h1:MJFqtd
 github.com/disintegration/imaging v1.6.3-0.20201218193011-d40f48ce0f09/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
 github.com/dlclark/regexp2 v1.12.0 h1:0j4c5qQmnC6XOWNjP3PIXURXN2gWx76rd3KvgdPkCz8=
 github.com/dlclark/regexp2 v1.12.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/dlclark/regexp2/v2 v2.5.2 h1:HAsucWRhsqcDzl6Ua9aR8JwYOTzrZyPrF0/FNxJVAI0=
+github.com/dlclark/regexp2/v2 v2.5.2/go.mod h1:avUrQvPaLz2DrFNHJF0taWAFFX2C1GMSSoeiqFjcBmU=
+github.com/dop251/goja v0.0.0-20260926152631-39ec2650adc9 h1:Ksd3Vil12b/ykT5NjGzd3qNc688cJB9OUXJZZChEktI=
+github.com/dop251/goja v0.0.0-20260926152631-39ec2650adc9/go.mod h1:u8yZRUavu+N4EnFFy6J5fVtjE7lEcZ2YyV2GcBXY9c8=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/esimov/pigo v1.4.7-0.20240801095032-7465ed14de47 h1:48iGRx9HamDuG4pCbPG5IXt4bKHhgn33KGynzHUgeIA=
@@ -69,6 +73,8 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/go-playground/validator/v10 v10.30.1 h1:f3zDSN/zOma+w6+1Wswgd9fLkdwy06ntQJp0BBvFG0w=
 github.com/go-playground/validator/v10 v10.30.1/go.mod h1:oSuBIQzuJxL//3MelwSLD5hc2Tu889bF0Idm9Dg26cM=
+github.com/go-sourcemap/sourcemap v2.1.3+incompatible h1:W1iEw64niKVGogNgBN3ePyLFfuisuzeidWPMPWmECqU=
+github.com/go-sourcemap/sourcemap v2.1.3+incompatible/go.mod h1:F8jJfvm2KbVjc5NqelyYJmf/v5J0dwNLS2mL4sNA1Jg=
 github.com/goccy/go-json v0.10.6 h1:p8HrPJzOakx/mn/bQtjgNjdTcN+/S6FcG2CTtQOrHVU=
 github.com/goccy/go-json v0.10.6/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/goccy/go-yaml v1.19.2 h1:PmFC1S6h8ljIz6gMRBopkjP1TVT7xuwrButHID66PoM=