feat(i18n): add zh_Hant and ja_JP translations to all adapter YAML files

- Add zh_Hant (Traditional Chinese) to all 17 adapter YAML metadata and config fields
- Add ja_JP translations to global adapters (Telegram, Discord, Slack, Lark, LINE)
- Fix buggy zh_Hant in line.yaml and slack.yaml (contained simplified Chinese)
- Add zh_Hant field to backend I18nString model
- Add adapter category grouping with locale-aware ordering
- Add webhook Cloud CTA for community edition users
- Fix wizard progress not clearing on skip/complete

web/src/app/infra/entities/api/index.ts

@@ -117,6 +117,7 @@ export interface Adapter {
   description: I18nObject;
   icon?: string;
   spec: {
+    categories?: string[];
     config: IDynamicFormItemSchema[];
   };
 }