Update litegraph (link snap to slot & highlight) (#1378)

* Update litegraph (link snap)

* Add settings

* nit

* Add playwright test

* Update test expectations [skip ci]

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Co-authored-by: github-actions <github-actions@github.com>

browser_tests/interaction.spec.ts

@@ -116,6 +116,24 @@ test.describe('Node Interaction', () => {
       await comfyPage.page.keyboard.up('Shift')
       await expect(comfyPage.canvas).toHaveScreenshot('copied-link.png')
     })
+
+    test('Auto snap&highlight when dragging link over node', async ({
+      comfyPage
+    }) => {
+      await comfyPage.setSetting('Comfy.Node.AutoSnapLinkToSlot', true)
+      await comfyPage.setSetting('Comfy.Node.SnapHighlightsNode', true)
+
+      await comfyPage.page.mouse.move(
+        comfyPage.clipTextEncodeNode1InputSlot.x,
+        comfyPage.clipTextEncodeNode1InputSlot.y
+      )
+      await comfyPage.page.mouse.down()
+      await comfyPage.page.mouse.move(
+        comfyPage.clipTextEncodeNode2InputSlot.x,
+        comfyPage.clipTextEncodeNode2InputSlot.y
+      )
+      await expect(comfyPage.canvas).toHaveScreenshot('snapped-highlighted.png')
+    })
   })
 
   test('Can adjust widget value', async ({ comfyPage }) => {