feat(core): Add support for pairedItem (beta) (#3012)

* ✨ Add pairedItem support

* 👕 Fix lint issue

* 🐛 Fix resolution in frontend

* 🐛 Fix resolution issue

* 🐛 Fix resolution in frontend

* 🐛 Fix another resolution issue in frontend

* ⚡ Try to automatically add pairedItem data if possible

* ⚡ Cleanup

* ⚡ Display expression errors in editor UI

* 🐛 Fix issue that it did not display errors in production

* 🐛 Fix auto-fix of missing pairedItem data

* 🐛 Fix frontend resolution for not executed nodes

* ⚡ Fail execution on pairedItem resolve issue and display information
about itemIndex and runIndex

* ⚡ Allow that pairedItem is only set to number if runIndex is 0

* ✨ Improve Expression Errors

* ⚡ Remove no longer needed code

* ⚡ Make errors more helpful

* ⚡ Add additional errors

* 👕 Fix lint issue

* ⚡ Add pairedItem support to core nodes

* ⚡ Improve support in Merge-Node

* ⚡ Fix issue with not correctly converted incoming pairedItem data

* 🐛 Fix frontend resolve issue

* 🐛 Fix frontend parameter name display issue

* ⚡ Improve errors

* 👕 Fix lint issue

* ⚡ Improve errors

* ⚡ Make it possible to display parameter name in error messages

* ⚡ Improve error messages

* ⚡ Fix error message

* ⚡ Improve error messages

* ⚡ Add another error message

* ⚡ Simplify

packages/nodes-base/nodes/SpreadsheetFile/SpreadsheetFile.node.ts

@@ -391,17 +391,36 @@ export class SpreadsheetFile implements INodeType {
 					if (options.headerRow === false) {
 						// Data was returned as an array - https://github.com/SheetJS/sheetjs#json
 						for (const rowData of sheetJson) {
-							newItems.push({ json: { row: rowData } } as INodeExecutionData);
+							newItems.push({
+								json: {
+									row: rowData,
+								},
+								pairedItem: {
+									item: i,
+								},
+							} as INodeExecutionData);
 						}
 					} else {
 						for (const rowData of sheetJson) {
-							newItems.push({ json: rowData } as INodeExecutionData);
+							newItems.push({
+								json: rowData,
+								pairedItem: {
+									item: i,
+								},
+							} as INodeExecutionData);
 						}
 					}
 
 				} catch (error) {
 					if (this.continueOnFail()) {
-						newItems.push({json:{ error: error.message }});
+						newItems.push({
+							json: {
+								error: error.message,
+							},
+							pairedItem: {
+								item: i,
+							},
+						});
 						continue;
 					}
 					throw error;
@@ -466,6 +485,9 @@ export class SpreadsheetFile implements INodeType {
 				const newItem: INodeExecutionData = {
 					json: {},
 					binary: {},
+					pairedItem: {
+						item: 0,
+					},
 				};
 
 				let fileName = `spreadsheet.${fileFormat}`;
@@ -478,7 +500,14 @@ export class SpreadsheetFile implements INodeType {
 				newItems.push(newItem);
 			} catch (error) {
 				if (this.continueOnFail()) {
-					newItems.push({json:{ error: error.message }});
+					newItems.push({
+						json: {
+							error: error.message,
+						},
+						pairedItem: {
+							item: 0,
+						},
+					});
 				} else {
 					throw error;
 				}