docs: revamp homepage and switch to custom GitHub buttons

- Make the docs English-only by removing all zh-cn content, the language switcher UI, and related JS/config

- Rework homepage feature cards (Safe & Typed, Pure JavaScript, Shopify & Jekyll, Streaming) and refresh section colors/layout

- Replace buttons.github.io with custom Star/Sponsor buttons featuring a live star count and dark-mode support

- Drop the buttons.js script and tidy banner, header, footer, and share partials

Co-authored-by: Cursor <[email protected]>

docs/themes/navy/languages/en.yml

@@ -10,7 +10,7 @@ index:
   get_started: Get Started
   contributors:
     title: Contributors
-    description: 'LiquidJS follows the <a href="https://github.com/all-contributors/all-contributors">all-contributors</a> specification, see <a href="tutorials/contribution-guidelines.html">guidelines here</a>! Thanks goes to these wonderful people:'
+    description: 'Thanks to these wonderful people! See <a href="tutorials/contribution-guidelines.html">contribution guidelines</a> if you&#39;d like to help.'
   sponsors:
     title: Sponsors
     description: 'If you personally love LiquidJS or it&#39;s benefiting your business, please <a href="https://github.com/sponsors/harttle">sponsor us</a>!'

docs/themes/navy/languages/zh-cn.yml

@@ -1,68 +0,0 @@
-menu:
-  tutorials: 教程
-  tags: 标签
-  filters: 过滤器
-  playground: 演示
-  api: API
-  search: 搜索
-
-index:
-  get_started: 开始使用
-  contributors:
-    title: 贡献
-    description: 'LiquidJS 欢迎任何形式的贡献，可以从 <a href="tutorials/contribution-guidelines.html">阅读贡献指南</a> 开始！感谢这些参与过 LiquidJS 项目的人：'
-  sponsors:
-    title: 赞助
-    description: '如果你喜欢 LiquidJS 或你的公司在使用 LiquidJS，请考虑 <a href="tutorials/contribution-guidelines.html#成为赞助者！">赞助 LiquidJS</a>！'
-
-playground:
-  title: 演示
-  loading: 加载中...
-
-page:
-  contents: 目录
-  back_to_top: 回到顶部
-  improve: 改进这篇文档
-  report: 报告问题
-  prev: 上一页
-  next: 下一页
-  last_updated: 上次更新：%s
-
-sidebar:
-  tutorials:
-    getting_started: 开始使用
-    intro: Liquid 简介
-    setup: 安装
-    options: 选项
-    render_file: 文件渲染
-    partials: 引用/继承
-    express: Express.js 中使用
-
-    advanced: 高级主题
-    caching: 缓存
-    escaping: 转义
-    registration: 注册标签/过滤器
-    access_scope_in_filters: 过滤器里访问上下文
-    parse_parameters: 参数解析
-    render_tag_content: 渲染标签内容
-    drops: Liquid Drop
-    sync_and_async: 同步和异步
-    whitespace: 换行和缩进
-    plugins: 插件
-    operators: 运算符
-    truth: 真和假
-    security_model: 安全模型
-    static_analysis: 静态分析
-
-    miscellaneous: 其他
-    migration9: '迁移到 LiquidJS 9'
-    contribution_guidelines: '贡献指南'
-    differences: 与 Shopify/liquid 的不同
-    changelog: '更新日志'
-  filters:
-    overview: 概述
-  tags:
-    overview: 概述
-
-footer:
-  license: '本文档通过 <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">CC BY 4.0</a> 授权。'