Feat: Add variable aggregator node #10427 (#11070)

### What problem does this PR solve?

Feat: Add variable aggregator node #10427

### Type of change


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

web/src/pages/agent/canvas/index.tsx

@@ -72,6 +72,7 @@ import { SwitchNode } from './node/switch-node';
 import { TemplateNode } from './node/template-node';
 import TokenizerNode from './node/tokenizer-node';
 import { ToolNode } from './node/tool-node';
+import { VariableAggregatorNode } from './node/variable-aggregator-node';
 import { VariableAssignerNode } from './node/variable-assigner-node';
 
 export const nodeTypes: NodeTypes = {
@@ -100,6 +101,7 @@ export const nodeTypes: NodeTypes = {
   contextNode: ExtractorNode,
   dataOperationsNode: DataOperationsNode,
   variableAssignerNode: VariableAssignerNode,
+  variableAggregatorNode: VariableAggregatorNode,
 };
 
 const edgeTypes = {

web/src/pages/agent/canvas/node/dropdown/accordion-operators.tsx

@@ -80,6 +80,7 @@ export function AccordionOperators({
               Operator.StringTransform,
               Operator.DataOperations,
               Operator.VariableAssigner,
+              Operator.VariableAggregator,
             ]}
             isCustomDropdown={isCustomDropdown}
             mousePosition={mousePosition}

web/src/pages/agent/canvas/node/variable-aggregator-node.tsx

@@ -0,0 +1,11 @@
+import { IRagNode } from '@/interfaces/database/agent';
+import { NodeProps } from '@xyflow/react';
+import { RagNode } from '.';
+
+export function VariableAggregatorNode({ ...props }: NodeProps<IRagNode>) {
+  return (
+    <RagNode {...props}>
+      <section>VariableAggregatorNode</section>
+    </RagNode>
+  );
+}