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/feishu.toml

@@ -5,6 +5,24 @@ category = "enterprise"
 icon = "🐦"
 protocol = "webhook"
 
+[i18n.zh]
+description = "飞书机器人适配器，在飞书协作平台中收发消息"
+
+[i18n.zh-TW]
+description = "飛書機器人適配器，在飛書協作平台中收發訊息"
+
+[i18n.ja]
+description = "Feishu（Lark）ボットアダプター、Feishuコラボレーションプラットフォームでのメッセージング"
+
+[i18n.ko]
+description = "Feishu(Lark) 봇 어댑터, Feishu 협업 플랫폼에서 메시지 송수신"
+
+[i18n.de]
+description = "Feishu (Lark) Bot-Adapter für Nachrichten in der Feishu-Kollaborationsplattform"
+
+[i18n.es]
+description = "Adaptador de bot Feishu (Lark) para mensajería en la plataforma de colaboración Feishu"
+
 [metadata]
 url = "https://www.feishu.cn"
 docs = "https://open.feishu.cn/document/"