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/@n8n/chat/src/components/Message.vue

@@ -1,6 +1,6 @@
 <script lang="ts" setup>
 /* eslint-disable @typescript-eslint/naming-convention */
-import type { ChatMessage } from '@/types';
+import type { ChatMessage } from '@n8n/chat/types';
 import type { PropType } from 'vue';
 import { computed, toRefs } from 'vue';
 import VueMarkdown from 'vue-markdown-render';
@@ -15,6 +15,10 @@ const props = defineProps({
 
 const { message } = toRefs(props);
 
+const messageText = computed(() => {
+	return message.value.text || '&lt;Empty response&gt;';
+});
+
 const classes = computed(() => {
 	return {
 		'chat-message-from-user': message.value.sender === 'user',
@@ -39,7 +43,7 @@ const markdownOptions = {
 		<slot>
 			<vue-markdown
 				class="chat-message-markdown"
-				:source="message.text"
+				:source="messageText"
 				:options="markdownOptions"
 			/>
 		</slot>