[Feature] Venn图支持剩余值布局

[afkdsghk211331]

What problem does this feature solve?

venn图支持剩余值布局，当sets为空的时候，返回一个另外的mark

What does the proposed API look like?

  data: {
    values: [
      // rest value

      { sets: [], value 6 },
      { sets: ['A'], value: 8 },
      { sets: ['B'], value: 10 },
      { sets: ['C'], value: 12 },
      { sets: ['A', 'B'], value: 4 },
      { sets: ['A', 'C'], value: 4 },
      { sets: ['B', 'C'], value: 4 },
      { sets: ['A', 'B', 'C'], value: 2 }
]