feat: 1.美团团购券相关接口

src/main/java/com/chaozhanggui/system/cashierservice/bean/constant/TableConstant.java

@@ -32,6 +32,18 @@ public interface TableConstant {
         }
     }
 
+    class ThirdPartyCoupon {
+        @Getter
+        public enum Plat {
+            MEI_TUAN("meituan");
+            private final String value;
+
+            Plat(String value) {
+                this.value = value;
+            }
+        }
+    }
+
     class OrderInfo {
         @Getter
         public enum Status {