init: add workspace files

world/map/xiangyang/walle17.js

@@ -0,0 +1,7 @@
+this.inherits(ROOM);
+this.name = "城墙";
+this.desc = "城墙顶面宽约丈余，外侧砌着半人高的垛口，每个垛口间留着方型射孔，俯身可见下方护城河泛着粼粼波光，偶尔有巡逻的兵卒从身边走过，甲胄碰撞发出 “哗啦” 声。";
+this.exits = {
+    south: "xiangyang/walle18",
+    north: "xiangyang/walle16"
+};