[codex] clean up outdated project suggestions

[Sean-Kenneth-Doherty]

Summary

• Removes seven project cards whose GitHub repositories are archived: AllenNLP, Rebus, Leapcode, Markdown Dungeon, CSS-Art, DSA, and Idea Hub.
• Updates moved and canonical GitHub repository links so project cards point at current repos instead of redirects.
• Replaces broken TypeScript and Codename One project logo URLs with working image URLs.
• Removes duplicate Open Source Diversity, Mattermost, and Ansible cards.
• Addresses Remove Outdated Projects from Project Suggestions #362.
• Refs Improve best practices lighthouse score for the app. #347 and Website carbon rating is poor (Grade F) - Optimization needed #470 by reducing stale project data, redirects, and broken visual assets that affect Lighthouse/best-practices results.

Why

Archived, moved, duplicate, and visually broken project cards make the project list less useful for first-time contributors. Keeping the list pointed at active canonical repositories with loading logos improves the chance that users land on maintainable contribution surfaces.

Validation

• pnpm build
• git diff --check
• Verified the removed repositories are archived through the GitHub API.
• Verified updated target repositories are public, unarchived, and resolve as canonical GitHub repos.
• Verified updated /contribute URLs for PouchDB, Rust Clippy, Next.js, Hyper, PowerShell, VS Code, Kap, and Jest return HTTP 200.
• Verified replacement TypeScript, Codename One, and Jest image URLs return HTTP 200 image responses.
• Verified the built index contains the new links and image URLs, removes exact stale URLs, and renders only one Open Source Diversity, Mattermost, and Ansible card.

[Sean-Kenneth-Doherty]

Moved out of draft after validating the current branch, including the follow-up Hyper canonical link update.

Validation:

• pnpm build
• git diff --check
• Source scan confirmed updated canonical links are present and stale archived/moved URLs are absent.
• Built dist/index.html contains the updated links, removes exact stale URLs, and has one Mattermost card.
• Live contribute URL checks returned HTTP 200 for:
  • https://github.com/vercel/hyper/contribute
  • https://github.com/apache/pouchdb/contribute
  • https://github.com/rust-lang/rust-clippy/contribute
  • https://github.com/vercel/next.js/contribute