vue数据处理：把数组处理成适用于tree组件的数据

例： 数据处理前： [{"id":1,"pid":0,"name":"默认维度","type":"0"}, {"id":2,"pid":1,"name":"上海科技有限公司","type":"1"}, {"id":3,"pid":2,"name":"北京科技有限公司","type":"1"}, {"id":4,"pid":2,"name":"北京科技有限公司","type":"1"}, {"id"

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