[WIP] Fix internationalization support and webhook management issues

[Copilot]

Implementation Plan

Phase 1: Internationalization (i18n) Support

• Create i18n infrastructure
  • Add i18n configuration and locales structure
  • Create English (en) locale file
  • Create Chinese (zh-CN) locale file
• Internationalize existing tools
  • gitea-review.ts - review messages
  • gitea-comment.ts - comment messages
  • gitea-pr-diff.ts - diff messages
  • gitea-pr-files.ts - files messages
  • gitea-incremental-diff.ts - incremental diff messages

Phase 2: Webhook Management Tools

• Create gitea-webhook-list tool
  • Query webhooks from Gitea API in real-time
  • Support filtering by repository
  • Return webhook status and configuration
• Create gitea-webhook-create tool
  • Create webhook with proper configuration
  • Support custom webhook URLs
  • Handle access token requirements
• Create gitea-webhook-delete tool
  • Delete webhook by ID
  • Proper error handling for access token issues
  • Validate webhook exists before deletion
• Create gitea-webhook-status tool
  • Check webhook health/status
  • Verify webhook configuration
  • Support manual refresh

Phase 3: Testing & Documentation

• Add tests for new tools
• Update README with webhook management features
• Update README_zh with Chinese documentation
• Add examples and usage instructions

Original prompt

处理国际化问题，保证所有内容国际化支持
并处理以下问题

1. 当前导入仓库实际是支持自动创建giteawebhook的但是，用户无法在仓库管理界面删除webhook
   Webhook 删除失败
   Repository has no access token configured
2. 在gitea中删除了对应的webhook，我们在平台也需要查询
3. 用户如果手动配置了webhook我们应该也需要进行查询
   也就是说不采用落库的方案而是采用实时查询的方案，或临时缓存的方案允许用户手动刷新状态

The user has attached the following file paths as relevant context:

• .github/copilot-instructions.md

创建自 VS Code。

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