feat: add i18n descriptions to all hands and channels (#22)

Add [i18n.zh], [i18n.zh-TW], [i18n.ja], [i18n.ko], [i18n.de], [i18n.es]
sections with translated descriptions to:
- 15 Hand TOML files (hands/*/HAND.toml)
- 44 Channel TOML files (channels/*.toml)

This enables the website to display localized Hand and Channel descriptions
based on the user's selected language.

channels/rocketchat.toml

@@ -5,6 +5,24 @@ category = "enterprise"
 icon = "🚀"
 protocol = "rest-api"
 
+[i18n.zh]
+description = "Rocket.Chat 适配器，在自托管 Rocket.Chat 实例中收发消息"
+
+[i18n.zh-TW]
+description = "Rocket.Chat 適配器，在自架 Rocket.Chat 實例中收發訊息"
+
+[i18n.ja]
+description = "Rocket.Chatアダプター、セルフホストRocket.Chatインスタンスでのメッセージング"
+
+[i18n.ko]
+description = "Rocket.Chat 어댑터, 자체 호스팅 Rocket.Chat 인스턴스에서 메시지 송수신"
+
+[i18n.de]
+description = "Rocket.Chat-Adapter für Nachrichten in selbstgehosteten Rocket.Chat-Instanzen"
+
+[i18n.es]
+description = "Adaptador de Rocket.Chat para mensajería en instancias autoalojadas de Rocket.Chat"
+
 [metadata]
 url = "https://www.rocket.chat"
 docs = "https://developer.rocket.chat/reference/api"