adds routing engine

web/src/lib/i18n/locales/zh.json

@@ -40,6 +40,7 @@
   "distance": "距离",
   "documentation": "文档",
   "download-gpx": "下载 GPX",
+  "draw-on-map": "",
   "dutch": "荷兰语",
   "easy": "简单",
   "edit": "编辑",
@@ -128,6 +129,7 @@
   "show-on-map": "地图中展示",
   "slogan": "保存你的冒险！",
   "sort": "排序",
+  "stop-drawing": "",
   "summit-book": "详细日程",
   "text": "文本",
   "trail": "{n, plural, =1 {路线} other {路线}}",