[Refactor] customMergeCell can support array

[fangsmile]

What problem does this feature solve?

option can support array type; text can set which cell's Value;

customMergeCell: [
    {
        text: '总结栏：此数据为一份人员基本信息', or {col:0,row: table.rowCount-1}
        range: {
          start: {
            col: 0,
            row: table.rowCount-1
          },
          end: {
            col: table.colCount-1,
            row: table.rowCount-1
          }
        },
      },
     {
        text: '总结栏：此数据为一份人员基本信息',
        range: {
          start: {
            col: 0,
            row: table.rowCount-1
          },
          end: {
            col: table.colCount-1,
            row: table.rowCount-1
          }
        },
      },

]

What does the proposed API look like?

option can support array type, text can set which cell's Value

[SeeMeJuiner]

buddy, how's going on for this requirement

[fangsmile]

另外一种配置需求：