didi / didi/LogicFlow

[Feature]: 增加连线到空白处事件

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core: edge type:feature-require
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TypeScript
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Description

### 背景&目的

目前有anchor:dragend事件 ( 锚点连线结束,不管是否创建连线都会触发),想要实现一个功能,当连线到画布空白区域时,弹出节点选择列表弹窗,选择之后快速创建一个节点并连接,但是没有相关事件,无法判断连线是否在空白画布区域松开。这个功能也是大部分流程逻辑图的主流操作,如果能提供插件或者自带就更好了

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