feat: Add WhatsApp Business Trigger Node (#8840)

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

packages/nodes-base/nodes/WhatsApp/WhatsAppTrigger.node.json

@@ -0,0 +1,18 @@
+{
+	"node": "n8n-nodes-base.whatsAppTrigger",
+	"nodeVersion": "1.0",
+	"codexVersion": "1.0",
+	"categories": ["Communication"],
+	"resources": {
+		"credentialDocumentation": [
+			{
+				"url": "https://docs.n8n.io/integrations/credentials/whatsapp/"
+			}
+		],
+		"primaryDocumentation": [
+			{
+				"url": "https://docs.n8n.io/integrations/builtin/trigger-nodes/n8n-nodes-base.whatsapptrigger/"
+			}
+		]
+	}
+}