Collect docs for C++ documentation generators (Doxygen, Sphinx with Breathe & Exhale)

[henry0816191]

Summary

Scrape and collect documentation for C++ documentation generation tools listed in the investigation. Doc sources need to be identified.

Tools & known sources

• Doxygen: TBD (identify official docs)
• Sphinx (with Breathe & Exhale): TBD (identify official docs)

Acceptance criteria

• Doc sources identified for Doxygen, Sphinx, Breathe, and Exhale.
• Documentation scraped/collected for each tool.
• Output format and storage location agreed and documented.