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/revolt.toml

@@ -5,6 +5,24 @@ category = "developer"
 icon = "🔴"
 protocol = "websocket"
 
+[i18n.zh]
+description = "Revolt 适配器，在开源 Revolt 聊天平台中收发消息"
+
+[i18n.zh-TW]
+description = "Revolt 適配器，在開源 Revolt 聊天平台中收發訊息"
+
+[i18n.ja]
+description = "Revoltアダプター、オープンソースRevoltチャットプラットフォームでのメッセージング"
+
+[i18n.ko]
+description = "Revolt 어댑터, 오픈소스 Revolt 채팅 플랫폼에서 메시지 송수신"
+
+[i18n.de]
+description = "Revolt-Adapter für Nachrichten in der Open-Source-Revolt-Chat-Plattform"
+
+[i18n.es]
+description = "Adaptador de Revolt para mensajería en la plataforma de chat de código abierto Revolt"
+
 [metadata]
 url = "https://revolt.chat"
 docs = "https://developers.revolt.chat/api/"