Support placeholders in maps

locales/zh-CN.json

@@ -270,6 +270,12 @@
   "nbt_operation.target": "复制目标",
   "nbt_operation_add": "添加操作",
   "nbt_operation_remove": "移除操作",
+  "placeholder.advancement": "一个进度 ID",
+  "placeholder.block_state": "一个方块状态键",
+  "placeholder.effect": "一个状态效果 ID",
+  "placeholder.fluid_state": "一个流体状态键",
+  "placeholder.objective": "一个记分项",
+  "placeholder.recipe": "一个配方 ID",
   "pool.bonus_rolls": "每级幸运增加的抽取次数",
   "pool.rolls": "抽取次数",
   "pool_add": "添加随机池",