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/gotify.toml

@@ -5,6 +5,24 @@ category = "iot"
 icon = "🔊"
 protocol = "rest-api"
 
+[i18n.zh]
+description = "Gotify 适配器，向自托管 Gotify 服务器发送推送通知"
+
+[i18n.zh-TW]
+description = "Gotify 適配器，向自架 Gotify 伺服器發送推播通知"
+
+[i18n.ja]
+description = "Gotifyアダプター、セルフホストGotifyサーバーへのプッシュ通知送信"
+
+[i18n.ko]
+description = "Gotify 어댑터, 자체 호스팅 Gotify 서버에 푸시 알림 전송"
+
+[i18n.de]
+description = "Gotify-Adapter zum Senden von Push-Benachrichtigungen an einen selbstgehosteten Gotify-Server"
+
+[i18n.es]
+description = "Adaptador de Gotify para enviar notificaciones push a un servidor Gotify autoalojado"
+
 [metadata]
 url = "https://gotify.net"
 docs = "https://gotify.net/docs/"