feat(洗车): 新增洗车页面及相关功能

新增洗车页面，包括页面结构、样式和逻辑处理。支持显示进行中的洗车订单，并提供结算功能。同时，在首页添加了洗车订单的提示入口，方便用户查看订单状态

pages/washing/washing.wxml

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+<view class="spinner">
+  <view class="time">
+    <text class="wangdian">{{agentname}}</text>
+    <text class="mactime">{{countdown}}</text>
+    <text class="macid">{{devicecode}}</text>
+
+  </view>
+  <view class="spinner-container container1">
+    <view class="circle1"></view>
+    <view class="circle2"></view>
+    <view class="circle3"></view>
+    <view class="circle4"></view>
+  </view>
+  <view class="spinner-container container2">
+    <view class="circle1"></view>
+    <view class="circle2"></view>
+    <view class="circle3"></view>
+    <view class="circle4"></view>
+  </view>
+  <view class="spinner-container container3">
+    <view class="circle1"></view>
+    <view class="circle2"></view>
+    <view class="circle3"></view>
+    <view class="circle4"></view>
+  </view>
+  <view class="spinner-container container4">
+    <view class="circle1"></view>
+    <view class="circle2"></view>
+    <view class="circle3"></view>
+    <view class="circle4"></view>
+  </view>
+  <view class="spinner-container container5">
+    <view class="circle1"></view>
+    <view class="circle2"></view>
+    <view class="circle3"></view>
+    <view class="circle4"></view>
+  </view>
+</view>
+<view class="btn">
+  <button type="primary" bindtap="handleSettlement">结 算 洗 车</button>
+</view>
+<service-tel></service-tel>