MiniMap

Note⚠️: Starting from graphin version 2.6.0, we have built this component from @antv/graphin-components into @antv/graphin, please refer to [release documentation](https://www.yuque .com/antv/gi/gstoyh)

MiniMap is a common interactive component that allows users to see where the content of the current canvas is located globally. Allows for quick preview and exploration on large graphs.