refactor: 重命名 customer-mobile 为 cashier-customer

统一收银相关项目命名：
- cashier-mobile: 收银端（店员使用）
- cashier-customer: 顾客端（顾客使用）

更新所有相关配置和引用

cashier-customer/manifest.json

@@ -0,0 +1,30 @@
+{
+  "name": "收银顾客端",
+  "appid": "__UNI__CUSTOMER001",
+  "description": "睿核科技顾客端移动端",
+  "versionName": "1.0.0",
+  "versionCode": "100",
+  "transformPx": false,
+  "app-plus": {
+    "usingComponents": true,
+    "splashscreen": {
+      "alwaysShowBeforeRender": true,
+      "waiting": true,
+      "autoclose": true,
+      "delay": 0
+    }
+  },
+  "mp-weixin": {
+    "appid": "",
+    "setting": {
+      "urlCheck": false
+    },
+    "usingComponents": true
+  },
+  "h5": {
+    "title": "顾客端",
+    "router": {
+      "mode": "hash"
+    }
+  }
+}