feat: Line Channel (#2904)

- Ability to configure line bots as a channel in chatwoot
- Receive a message sent to the line bot in chatwoot
- Ability to reply to line users from chatwoot

fixes: #2738

app/javascript/dashboard/components/widgets/ChannelItem.vue

@@ -76,7 +76,16 @@ export default {
       if (key === 'email') {
         return this.enabledFeatures.channel_email;
       }
-      return ['website', 'twilio', 'api', 'whatsapp', 'sms', 'telegram'].includes(key);
+
+      return [
+        'website',
+        'twilio',
+        'api',
+        'whatsapp',
+        'sms',
+        'telegram',
+        'line',
+      ].includes(key);
     },
   },
   methods: {