refactor(packages): add @reactflow/system

packages/core/src/components/ConnectionLine/index.tsx

@@ -1,12 +1,12 @@
 import { CSSProperties, useCallback } from 'react';
 import { shallow } from 'zustand/shallow';
 import cc from 'classcat';
+import { internalsSymbol } from '@reactflow/system';
 
 import { useStore } from '../../hooks/useStore';
 import { getBezierPath } from '../Edges/BezierEdge';
 import { getSmoothStepPath } from '../Edges/SmoothStepEdge';
 import { getSimpleBezierPath } from '../Edges/SimpleBezierEdge';
-import { internalsSymbol } from '../../utils';
 import type {
   ConnectionLineComponent,
   ConnectionStatus,

packages/core/src/components/Handle/utils.ts

@@ -1,7 +1,8 @@
 import { MouseEvent as ReactMouseEvent, TouchEvent as ReactTouchEvent } from 'react';
+import { internalsSymbol } from '@reactflow/system';
 
 import { ConnectionMode, ConnectionStatus } from '../../types';
-import { getEventPosition, internalsSymbol } from '../../utils';
+import { getEventPosition } from '../../utils';
 import type { Connection, HandleType, XYPosition, Node, NodeHandleBounds } from '../../types';
 
 export type ConnectionHandle = {