feat(core): Add support for building LLM applications (#7235)

This extracts all core and editor changes from #7246 and #7137, so that
we can get these changes merged first.

ADO-1120

[DB Tests](https://github.com/n8n-io/n8n/actions/runs/6379749011)
[E2E Tests](https://github.com/n8n-io/n8n/actions/runs/6379751480)
[Workflow Tests](https://github.com/n8n-io/n8n/actions/runs/6379752828)

---------

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>
Co-authored-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Alex Grozav <alex@grozav.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/cli/src/config/schema.ts

@@ -431,6 +431,13 @@ export const schema = {
 			format: ['main', 'webhook', 'worker'] as const,
 			default: 'main',
 		},
+
+		isBetaRelease: {
+			doc: 'If it is a beta release',
+			format: 'Boolean',
+			default: false,
+			env: 'IS_BETA_RELEASE',
+		},
 	},
 
 	// How n8n can be reached (Editor & REST-API)