feat: 搭建微信小程序展示端

- 初始化小程序工程配置与类型声明

- 增加首页、律所、律师列表、详情与历史页面

- 补充公共组件、运行时配置与示例素材

frontend_miniprogram/miniprogram/components/action-dock/action-dock.ts

@@ -0,0 +1,8 @@
+Component({
+  methods: {
+    handleAction(event: WechatMiniprogram.TouchEvent) {
+      const action = event.currentTarget.dataset.action as string;
+      this.triggerEvent('action', { action });
+    },
+  },
+});