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/reddit.toml

@@ -5,6 +5,24 @@ category = "social"
 icon = "🤖"
 protocol = "rest-api"
 
+[i18n.zh]
+description = "Reddit 适配器，通过 Reddit API 发布和阅读内容"
+
+[i18n.zh-TW]
+description = "Reddit 適配器，透過 Reddit API 發布和閱讀內容"
+
+[i18n.ja]
+description = "Redditアダプター、Reddit APIを介したコンテンツの投稿と閲覧"
+
+[i18n.ko]
+description = "Reddit 어댑터, Reddit API를 통한 콘텐츠 게시 및 읽기"
+
+[i18n.de]
+description = "Reddit-Adapter zum Posten und Lesen von Inhalten über die Reddit-API"
+
+[i18n.es]
+description = "Adaptador de Reddit para publicar y leer contenido a través de la API de Reddit"
+
 [metadata]
 url = "https://www.reddit.com"
 docs = "https://www.reddit.com/dev/api/"