feat(Set Node): Overhaul (#6348)

Github issue / Community forum post (link here to close automatically):
https://github.com/n8n-io/n8n/pull/6348

---------

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>
Co-authored-by: Marcus <marcus@n8n.io>

packages/nodes-base/nodes/Set/v2/raw.mode.ts

@@ -0,0 +1,69 @@
+import type {
+	INodeExecutionData,
+	IExecuteFunctions,
+	INodeProperties,
+	IDataObject,
+	INode,
+} from 'n8n-workflow';
+import { NodeOperationError } from 'n8n-workflow';
+
+import { parseJsonParameter, composeReturnItem, resolveRawData } from './helpers/utils';
+import type { SetNodeOptions } from './helpers/interfaces';
+import { updateDisplayOptions } from '../../../utils/utilities';
+
+const properties: INodeProperties[] = [
+	{
+		displayName: 'JSON Output',
+		name: 'jsonOutput',
+		type: 'string',
+		typeOptions: {
+			editor: 'json',
+			editorLanguage: 'json',
+			rows: 5,
+		},
+		default: '{\n  "my_field_1": "value",\n  "my_field_2": 1\n}',
+		validateType: 'object',
+		ignoreValidationDuringExecution: true,
+	},
+];
+
+const displayOptions = {
+	show: {
+		mode: ['raw'],
+	},
+};
+
+export const description = updateDisplayOptions(displayOptions, properties);
+
+export async function execute(
+	this: IExecuteFunctions,
+	item: INodeExecutionData,
+	i: number,
+	options: SetNodeOptions,
+	rawData: IDataObject,
+	node: INode,
+) {
+	try {
+		let newData: IDataObject;
+		if (rawData.jsonOutput === undefined) {
+			const json = this.getNodeParameter('jsonOutput', i) as string;
+			newData = parseJsonParameter(json, node, i);
+		} else {
+			newData = parseJsonParameter(
+				resolveRawData.call(this, rawData.jsonOutput as string, i),
+				node,
+				i,
+			);
+		}
+
+		return composeReturnItem.call(this, i, item, newData, options);
+	} catch (error) {
+		if (this.continueOnFail()) {
+			return { json: { error: (error as Error).message } };
+		}
+		throw new NodeOperationError(node, error as Error, {
+			itemIndex: i,
+			description: error.description,
+		});
+	}
+}