refactor(utils): put in folder

src/container/EdgeRenderer/index.js

@@ -2,7 +2,7 @@ import React, { memo } from 'react';
 import { useStoreState } from 'easy-peasy';
 
 import ConnectionLine from '../../components/ConnectionLine';
-import { isEdge } from '../../graph-utils';
+import { isEdge } from '../../utils/graph';
 
 function getHandlePosition(position, node, handle = null) {
   if (!handle) {

src/container/GraphView/index.js

@@ -10,7 +10,7 @@ import useD3Zoom from '../../hooks/useD3Zoom';
 import useGlobalKeyHandler from '../../hooks/useGlobalKeyHandler';
 import useElementUpdater from '../../hooks/useElementUpdater'
 import { getDimensions } from '../../utils';
-import { fitView, zoomIn, zoomOut } from '../../graph-utils';
+import { fitView, zoomIn, zoomOut } from '../../utils/graph';
 
 const GraphView = memo(({
   nodeTypes, edgeTypes, onMove, onLoad,

src/container/NodeRenderer/index.js

@@ -1,7 +1,7 @@
 import React, { memo } from 'react';
 import { useStoreState } from 'easy-peasy';
 
-import { isNode } from '../../graph-utils';
+import { isNode } from '../../utils/graph';
 
 function renderNode(d, props, state) {
   const nodeType = d.type || 'default';