feat(docs): add project docs wiki

[cywf]

Summary

Turn the portfolio documentation page into a mini project docs wiki for 16 presentable public repositories.

What changed

• Added grouped project overview cards and collapsible technical detail sections.
• Added direct links to repositories, discussions, project boards, wikis, issues, pull requests, templates, and deployed sites when available.
• Added generated repository metadata and codebase diagrams.
• Added accessible diagram assets and pre-rendered screenshots.

Why it changed

The previous page rendered the portfolio README and did not provide a project-by-project documentation entrypoint or the requested repository navigation.

Testing performed

• npm run build
• npm test
• Validated all 16 project records, HTTPS links, and referenced diagram files.
• git diff --check

Screenshots or logs

The generated diagram screenshots are included under site/public/docs/project-wiki/screenshots/.

Security considerations

• Project data is limited to public repositories.
• External links are HTTPS-only and open with noopener noreferrer.
• No credentials or private repository metadata are included.

Follow-up work

• Review project inclusion and grouping.
• Consider moving repository-data generation into a scheduled workflow.
• Investigate client build duration and stale Browserslist metadata separately.

[cywf]

Closing this draft as stale/superseded during CYWF portfolio cleanup. The current project-first portfolio direction is covered by later overhaul work; please reopen or file a fresh PR if a specific change is still needed.