Add Unreal Engine style bezier edge

src/types/edges.ts

@@ -1,9 +1,9 @@
-import { CSSProperties, ReactNode, HTMLAttributes } from 'react';
-
-import { Position } from './utils';
+import { CSSProperties, HTMLAttributes, ReactNode } from 'react';
 import { Connection } from './general';
 import { HandleElement } from './handles';
 import { Node } from './nodes';
+import { Position } from './utils';
+
 
 // interface for the user edge items
 export interface Edge<T = any> {
@@ -62,6 +62,7 @@ export interface EdgeProps<T = any> {
   targetHandleId?: string | null;
   markerStart?: string;
   markerEnd?: string;
+  curvature?: number;
 }
 
 export type EdgeMouseHandler = (event: React.MouseEvent, edge: Edge) => void;