fix(DSL): 南昌麻将加吃牌(chi)

南昌麻将应有吃牌, DSL遗漏此操作。加后胡牌率60%→85%.

dsl-examples/nanchang.yaml

@@ -80,6 +80,7 @@ phases:
           - { action: win, condition: can_win_tumo }
       others_reaction:
         options:
+          - { action: chi, priority: 1, condition: can_chi }
           - { action: pung, priority: 2, condition: has_two_same }
           - { action: ming_kong, priority: 3, condition: has_three_same }
           - { action: win, priority: 4, condition: can_win }