サーバレス実装ガイドの内容充実とセットアップ手順の改善

[SasakiTakatsugu]

Check List

• 画像の追加・変更を行っている場合、wikiに記載している ルールに準拠していることを確認した

サーバレスサンプルアプリを作成し、それに合わせてページ内容を変更しました。
フロント
https://github.com/saasus-platform/implementation-sample-front-react-serverless
バックエンド
https://github.com/saasus-platform/implementation-sample-api-lambda

変更ページ

• 第VI部：開発ドキュメント > 実装ガイド > SaaSus Platformを使った実装（サーバレス）

• 変更前

• 変更後

[Copilot]

Pull Request Overview

This PR enhances the serverless implementation guide with comprehensive content and detailed setup instructions. The documentation now includes complete implementation examples for a serverless SaaS application using SaaSus Platform, with links to new sample repositories for both frontend (React) and backend (Lambda).

Key Changes:

• Added detailed screen and feature descriptions with direct links to implementation files
• Expanded backend API implementation examples with complete, production-ready code
• Added comprehensive setup instructions covering prerequisites, deployment, and verification

Reviewed Changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

File	Description
versioned_docs/version-1.11/part-6/implementation-guide/implementing-authentication-using-saasus-serverless.md	English documentation updated with complete implementation guide and setup instructions
i18n/ja/docusaurus-plugin-content-docs/version-1.11/part-6/implementation-guide/implementing-authentication-using-saasus-serverless.md	Japanese version 1.11 documentation updated with same enhancements
i18n/ja/docusaurus-plugin-content-docs/current/part-6/implementation-guide/implementing-authentication-using-saasus-serverless.md	Japanese current version documentation updated with same enhancements
docs/part-6/implementation-guide/implementing-authentication-using-saasus-serverless.md	English current version documentation updated with same enhancements

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

[nitpick] The list items use trailing double spaces for line breaks in Markdown, but this is inconsistent with the rest of the document which uses list formatting. Consider using proper Markdown list syntax without trailing spaces for better readability and maintainability.

Suggested change

	a. Create a tenant
	b. Link the logged-in user to the created tenant
	c. Set the logged-in user as the administrator of the tenant
	1. Create a tenant
	2. Link the logged-in user to the created tenant
	3. Set the logged-in user as the administrator of the tenant

[SasakiTakatsugu]

日本語ページのa,b,cと合わせているので対応しない。

[SasakiTakatsugu]

この内容に紐づくサンプルアプリに不具合があったのでマージしないでください。