feat(Date & Time Node): Overhaul of the node (#5904)

* Setup versionized node

* Fix node naming

* Set all possible actions

* Add Current Date operation

* Add timezone to current date

* feat add to date operator

* Change output field name to camel case

* Fix info box for luxons tip

* Feat subtract to date operation

* Feat format date operation

* Fix to node field for format date

* Feat rounding operation

* Feat get in between date operation

* Feat add extract date operation

* Add generic function for parsing date

* Remove moment methods from operations

* Change moment to luxon for the rest of the operations

* Fix Format date operation

* Fix format value

* Add timezone option for current date

* Add tests, improve workflow settings for testing, toString the results

* Change icon for V2

* Revert "Change icon for V2"

This reverts commit 46b59bea2ec6dd02a22f8d07a9736b42d751d10f.

* Change workflow  test name

* Fix ui bug for custom format

* Fix default value for format operation

* Fix info box for rounding operation

* Change default for units for between time operation

* Inprove fields and resort time units

* Fix extract week number

* Resolve issue with formating and timezones

* Fix field name and unit order

* ⚡ restored removed test case, sync v1 with curent master

* ⚡ parseDate update to support timestamps, tests

* Keep same field for substract and add time

* Update unit test

* Improve visibility, add iso to string option

* Update option naming

---------

Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/nodes/DateTime/V2/GenericFunctions.ts

@@ -0,0 +1,50 @@
+import { DateTime } from 'luxon';
+import moment from 'moment';
+import type { IExecuteFunctions } from 'n8n-workflow';
+import { NodeOperationError } from 'n8n-workflow';
+
+export function parseDate(
+	this: IExecuteFunctions,
+	date: string | number | DateTime,
+	timezone?: string,
+) {
+	let parsedDate;
+
+	if (date instanceof DateTime) {
+		parsedDate = date;
+	} else {
+		// Check if the input is a number
+		if (!Number.isNaN(Number(date))) {
+			//input is a number, convert to number in case it is a string formatted number
+			date = Number(date);
+			// check if the number is a timestamp in float format and convert to integer
+			if (!Number.isInteger(date)) {
+				date = date * 1000;
+			}
+		}
+
+		if (Number.isInteger(date)) {
+			const timestampLengthInMilliseconds1990 = 12;
+			// check if the number is a timestamp in seconds or milliseconds and create a moment object accordingly
+			if (date.toString().length < timestampLengthInMilliseconds1990) {
+				parsedDate = DateTime.fromSeconds(date as number);
+			} else {
+				parsedDate = DateTime.fromMillis(date as number);
+			}
+		} else {
+			if (!timezone && (date as string).includes('+')) {
+				const offset = (date as string).split('+')[1].slice(0, 2) as unknown as number;
+				timezone = `Etc/GMT-${offset * 1}`;
+			}
+
+			parsedDate = DateTime.fromISO(moment(date).toISOString());
+		}
+
+		parsedDate = parsedDate.setZone(timezone || 'Etc/UTC');
+
+		if (parsedDate.invalidReason === 'unparsable') {
+			throw new NodeOperationError(this.getNode(), 'Invalid date format');
+		}
+	}
+	return parsedDate;
+}