refactor(assets): vendor 资产迁入标准目录并全仓去除 zibll 标识

- assets/vendor 全量迁移: fontawesome5→assets/fontawesome5, css→assets/css,
  js→assets/js/runtime(避开 14 个同名自有文件), img 合并去重→assets/img,
  fonts→assets/fonts; 删除 assets/vendor
- libs 五个与 widgets/third-party 字节相同的库不重复入库, loader paths 改指向
- 运行时切换: _win.uri=assets 根, loader baseUrl=/js/runtime, enlighter 注入
  路径同步; PHP 7 个引用文件切换并改名 $zibll_*→$runtime_*
- 去品牌: Qinver 头注释/品牌 console.log/演示链接清除, 默认文案中性化
- 功能标识符改名: zib__→aksrt__, zib_ajax→aksrt_ajax, window.zib→
  window.aksrtLegacy, zibllblock/*→aksrtblock/*, .zib-widget→.aksrt-panel,
  .zib-slider→.aksrt-slider, zib_menu_options meta 键等
- 自有 CSS 改名: legacy-utilities/compat-vars/footer shell
- admin SPA 重建; 契约测试同步(路径/断言/文件更名)
- 例外保留: tests/visual 对照环境与 fixtures 前缀(外部 Zibll 产品引用)

验证: php -l 133 个改动文件通过; runtime 86 个 JS node --check 通过;
契约测试 68/70(2 个失败经 stash 对照确认为存量问题)

assets/js/runtime/enlighter/enlighterjs.min.css

@@ -0,0 +1 @@
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0;empty-cells:show;min-width:100%;font-size:10px;margin:0;text-indent:0;-webkit-overflow-scrolling:touch;counter-reset:enlighter 0}div.enlighter>div{margin:0;border:solid 0 #fff;list-style:none;font-size:inherit;line-height:1.4;min-height:14px}div.enlighter>div>div{display:table-cell;width:100%;padding-left:10px}div.enlighter>div>div::before{content:" "}span.enlighter{display:inline-block;padding:3px 5px 1px 5px;margin:0 2px 0 2px}.enlighter span{margin:0;padding:0;line-height:inherit;font-size:13px;font-family:inherit}.enlighter-linenumbers div.enlighter>div::before{white-space:nowrap;display:block;display:table-cell;width:45px;min-width:45px;counter-increment:enlighter;content:counter(enlighter,decimal) ".";text-align:right;padding-right:8px}.enlighter-overflow-scroll.enlighter-v-standard .enlighter{overflow-x:auto;word-wrap:normal!important}.enlighter-overflow-scroll.enlighter-v-codegroup 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