feat: Add Chat Trigger node (#7409)

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>
Co-authored-by: Jesper Bylund <mail@jesperbylund.com>
Co-authored-by: OlegIvaniv <me@olegivaniv.com>
Co-authored-by: Deborah <deborah@starfallprojects.co.uk>
Co-authored-by: Jan Oberhauser <janober@users.noreply.github.com>
Co-authored-by: Jon <jonathan.bennetts@gmail.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>
Co-authored-by: Michael Kret <88898367+michael-radency@users.noreply.github.com>
Co-authored-by: Giulio Andreini <andreini@netseven.it>
Co-authored-by: Mason Geloso <Mason.geloso@gmail.com>
Co-authored-by: Mason Geloso <hone@Masons-Mac-mini.local>
Co-authored-by: Mutasem Aldmour <mutasem@n8n.io>

packages/editor-ui/src/components/Node.vue

@@ -6,6 +6,7 @@
 		:style="nodeWrapperStyles"
 		data-test-id="canvas-node"
 		:data-name="data.name"
+		:data-node-type="nodeType?.name"
 		@contextmenu="(e: MouseEvent) => openContextMenu(e, 'node-right-click')"
 	>
 		<div v-show="isSelected" class="select-background"></div>
@@ -1026,6 +1027,11 @@ export default defineComponent({
 				left: -67px;
 			}
 		}
+
+		&[data-node-type='@n8n/n8n-nodes-langchain.chatTrigger'] {
+			--configurable-node-min-input-count: 1;
+			--configurable-node-input-width: 176px;
+		}
 	}
 
 	&--trigger .node-default .node-box {