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/icons/navigation/icon-alp.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 22 22"><path stroke="#9ca1af" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.83" d="M6.838 10.221c-.577 0-1.045.468-1.045 1.045v4.694h3.475v-5.74 0z"/><path stroke="#9ca1af" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.83" d="M10.305 6.05c-.578 0-1.045.468-1.045 1.045v8.855h3.474V7.095c0-.577-.459-1.045-1.036-1.045zm2.435 5.73v4.17h3.474v-3.126a1.056 1.056 0 0 0-1.045-1.045z"/><path stroke="#9ca1af" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.83" d="M13.75 20.167c4.583 0 6.417-1.834 6.417-6.417v-5.5c0-4.583-1.834-6.416-6.417-6.416h-5.5c-4.583 0-6.417 1.833-6.417 6.416v5.5c0 4.584 1.834 6.417 6.417 6.417z"/></svg>