refactor: reorganize modules and add Linux build tooling

module/ec/order/proto/coupon.proto

@@ -0,0 +1,30 @@
+syntax = "proto3";
+package order;
+option go_package = "./order"; 
+import "blocks.proto";
+
+// Order(订单)微服务-优惠卷
+service Coupon {
+
+    // 按状态获取优惠卷
+    rpc ByStatus(Status) returns (CouponListReply) {};
+}
+
+message Status {
+    int32 status = 1; //优惠卷状态
+}
+
+message CouponListReply {
+    repeated CouponItem data = 1;  // 购物车中的商品数据列表
+}
+
+message CouponItem{
+  int64   id = 1; // ID
+  string  identity = 2;  // 唯一码
+  string  title = 3; //标题
+  string  intro = 4; //描述
+  string  amount = 5; //金额
+  string  started =6; // 开始时间
+  string  expired =7; // 结束时间
+  string  status =8; // 状态
+}