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/nostr.toml

@@ -5,6 +5,24 @@ category = "messaging"
 icon = "🟣"
 protocol = "websocket"
 
+[i18n.zh]
+description = "Nostr 适配器，在 Nostr 去中心化协议上发布和读取事件"
+
+[i18n.zh-TW]
+description = "Nostr 適配器，在 Nostr 去中心化協議上發布和讀取事件"
+
+[i18n.ja]
+description = "Nostrアダプター、Nostr分散型プロトコルでのイベントの公開と読み取り"
+
+[i18n.ko]
+description = "Nostr 어댑터, Nostr 탈중앙화 프로토콜에서 이벤트 발행 및 읽기"
+
+[i18n.de]
+description = "Nostr-Adapter zum Veröffentlichen und Lesen von Ereignissen im dezentralen Nostr-Protokoll"
+
+[i18n.es]
+description = "Adaptador de Nostr para publicar y leer eventos en el protocolo descentralizado Nostr"
+
 [metadata]
 url = "https://nostr.com"
 docs = "https://github.com/nostr-protocol/nips"