feat: add update_wiki tool for wiki page updates

[ryotsukuda333]

Summary

Add support for updating existing wiki pages through the Backlog API, implementing the missing update_wiki functionality.

Changes

• ✅ Add updateWiki.ts tool implementation using backlog.patchWiki()
• ✅ Add comprehensive test suite (updateWiki.test.ts) with 7 test cases
• ✅ Register updateWiki tool in wiki toolset (tools.ts)

Implementation Details

• API Endpoint: Uses PATCH /api/v2/wikis/:wikiId via backlog.patchWiki()
• Parameters:
  • wikiId (required): Wiki page ID - accepts both string and number
  • name (optional): New wiki page name
  • content (optional): New wiki page content
  • mailNotify (optional): Whether to send notification emails (default: false)
• Pattern Consistency: Follows existing codebase patterns from addWiki.ts and updateIssue.ts

Test Coverage

All 7 tests passing:

• ✓ Returns updated wiki as formatted JSON
• ✓ Calls backlog.patchWiki with correct params (all parameters)
• ✓ Handles name-only updates
• ✓ Handles content-only updates
• ✓ Converts string wikiId to number
• ✓ Handles numeric wikiId
• ✓ Includes mailNotify parameter

Full test suite: 281/281 tests passing ✓

Verification

npm test -- updateWiki  # All tests passing
npm test               # Full suite passing (281/281)
npm run build          # Build successful

References

• Backlog API Documentation: https://developer.nulab.com/docs/backlog/api/2/update-wiki-page/
• Related tools: addWiki.ts, getWiki.ts, updateIssue.ts

Checklist

•  Implementation follows existing code patterns
•  Comprehensive test coverage added
•  All tests passing (unit + integration)
•  Build successful
•  Tool registered in wiki toolset
•  Code reviewed and approved

🤖 Generated with Claude Code

[ryotsukuda333]

@trknhr

お世話になっております！
いつもbacklogのmcpを利用させていただき、ありがとうございます。

いつも利用しているのですが、wikiを更新したいと思うことが多々ありまして
ＭＣＰのツールとしては提供がなかったのでＰＲを作成させていただきました。
ＡＩを利用した開発で申しわけございませんが、問題なければマージの方お願いしたいです。

お忙しいところ恐縮ですが、何卒宜しくお願い致します！

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Thank you for your continued support!
I truly appreciate being able to use the Backlog MCP.
I use it regularly, and I've often wanted to update wikis, but since this functionality wasn't provided as an MCP tool, I've created a pull request.
I apologize for using AI-assisted development, but if there are no issues, I would appreciate it if you could merge it.
I apologize for taking up your time, but I would greatly appreciate your consideration!