增加pdf，xlsx，docx文件预览功能

yangys

2025-12-03 fdb0ed498f295b50c072c4b3652c08e2d60a747a

 src/views/dataex/mdmprogramimp.vue

@@ -55,7 +55,7 @@
          //   hide: true
          // },
          {
            label: '图号',
            label: '零组件号',
            prop: 'drawingNo'
          },
        {