Feat: Add agent operator node from agent form #3221 (#8144)

### What problem does this PR solve?

Feat: Add agent operator node from agent form #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/context.ts

@@ -1,6 +1,16 @@
 import { RAGFlowNodeType } from '@/interfaces/database/flow';
 import { createContext } from 'react';
+import { useAddNode } from './hooks/use-add-node';
 
 export const AgentFormContext = createContext<RAGFlowNodeType | undefined>(
   undefined,
 );
+
+type AgentInstanceContextType = Pick<
+  ReturnType<typeof useAddNode>,
+  'addCanvasNode'
+>;
+
+export const AgentInstanceContext = createContext<AgentInstanceContextType>(
+  {} as AgentInstanceContextType,
+);