Remove Tree Support

[Aarebecca]

As we know, a tree is a special unidirectional acyclic graph, Therefore, any graph that satisfies this structure can be displayed as the structure of a tree.

It is not a good way to handle trees alone, and G6 will only support the standard Graph structure data stored in JSON and remove support for tree data.

To convert a tree data to graph data, you can use this method:

import { transformTreeData } from '@antv/g6-utils';

const treeData = {
  id: 'id1',
  children: [
    // ...
  ]
};

const graphData = transformTreeData(oldData);