feat: Human in the loop (#10675)

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>

packages/workflow/src/Constants.ts

@@ -112,3 +112,5 @@ export const SINGLE_EXECUTION_NODES: { [key: string]: { [key: string]: NodeParam
 		operation: [undefined], // default info
 	},
 };
+
+export const SEND_AND_WAIT_OPERATION = 'sendAndWait';

packages/workflow/src/WorkflowDataProxy.ts

@@ -1391,6 +1391,7 @@ export class WorkflowDataProxy {
 			$thisItemIndex: this.itemIndex,
 			$thisRunIndex: this.runIndex,
 			$nodeVersion: that.workflow.getNode(that.activeNodeName)?.typeVersion,
+			$nodeId: that.workflow.getNode(that.activeNodeName)?.id,
 		};
 
 		return new Proxy(base, {