feat: Data transformation nodes and actions in Nodes Panel (#7760)

- Split Items List node into separate nodes per action
- Review node descriptions
- New icons
- New sections in subcategories

---------

Co-authored-by: Giulio Andreini <andreini@netseven.it>
Co-authored-by: Deborah <deborah@starfallprojects.co.uk>
Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/nodes/Webhook/Webhook.node.json

@@ -83,6 +83,6 @@
 	},
 	"alias": ["HTTP", "API", "Build", "WH"],
 	"subcategories": {
-		"Core Nodes": ["Flow"]
+		"Core Nodes": ["Helpers"]
 	}
 }