init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp/public/components/common/icon2.svg

@@ -0,0 +1,6 @@
+<svg width="18" height="18" viewBox="0 0 18 18" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M2.14258 11.4288L4.99972 14.2859L7.85686 11.4288" stroke="#4B5563" stroke-width="1.42857" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M5 14.2859L5 2.85735" stroke="#4B5563" stroke-width="1.42857" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M14.9994 5.71463L12.1423 2.85749L9.28516 5.71463" stroke="#4B5563" stroke-width="1.42857" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M12.1426 2.85735V14.2859" stroke="#4B5563" stroke-width="1.42857" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>