Add testing frameworks

As a dev or tester, I want to know what testing frameworks IntelliTect uses and why so that I can leverage that knowledge in my own projects

No file or test is named in the issue. Start by reviewing the repository's existing documentation and testing-related guidance, then identify the frameworks IntelliTect uses and document each framework with its rationale. Done means the repository clearly explains the frameworks and why they are used.

索引モデルが issue の本文から書いたものです。