feat: Add new expression variables and support for luxon

* 🔨 scaffolding for  and

* 🔨 added autocomplete

* 🔨 N8N-2961-New-expression-variables

* 🔨 added luxon DateTime to expressions and Functions node, replased  with , clean up

* 🔨 added  and , fixed  return values

* 🔨 added tests for new variables

* 🔨 removed unnecessary import

* 🔨 return type fix

* 🔨 working on review, wip

* 🔨 working on review, improved errors, wip

* 🔨 fixed disappearing error message box

* 🔨 excluded variables from function node, added jmespath setup

* :hamer: added $jmsepath to function nodes

* 🔨 replacing proxy with data when using jmespath

* 🔨 renamed function

* 🔨 updated tips to function nodes

* 🔨 fixes for errors messages

* 🔨 review fixes

* 🔨 removed $input and $() from autocomplete

* ⚡ removed comments

* ⚡ Remove unused code

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

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

@@ -36,6 +36,7 @@ export class Function implements INodeType {
 				type: 'string',
 				default: `// Code here will run only once, no matter how many input items there are.
 // More info and help: https://docs.n8n.io/nodes/n8n-nodes-base.function
+// Tip: You can use luxon for dates and $jmespath for querying JSON structures
 
 // Loop over inputs and add a new field called 'myNewField' to the JSON of each one
 for (item of items) {
@@ -151,7 +152,8 @@ return items;`,
 				// Try to find the line number which contains the error and attach to error message
 				const stackLines = error.stack.split('\n');
 				if (stackLines.length > 0) {
-					const lineParts = stackLines[1].split(':');
+					stackLines.shift();
+					const lineParts = stackLines.find((line: string) => line.includes('Function')).split(':');
 					if (lineParts.length > 2) {
 						const lineNumber = lineParts.splice(-2, 1);
 						if (!isNaN(lineNumber)) {