[codex] add Prettier to project suggestions

[Sean-Kenneth-Doherty]

Summary

• add Prettier to the project suggestions list
• link the card to the Prettier GitHub contributor page
• include GitHub avatar, concise description, and formatting/tooling tags

Validation

• GitHub API reports prettier/prettier is public, unarchived, and on main
• https://github.com/prettier/prettier/contribute returns HTTP 200
• https://avatars.githubusercontent.com/u/25822731?v=4 returns HTTP 200
• prettier/prettier has open help wanted issues
• Prettier source count is 1 via src/data/projects.js import
• git diff --check
• GITHUB_TOKEN=$(gh auth token) pnpm build
• generated dist/index.html contained the Prettier card and contributor link before restoring generated files

Addresses #1

[Sean-Kenneth-Doherty]

Validated locally on head e15f75cfc2e7d9dc375c2a449bc75fc9f22d3dd5 in an isolated worktree:

• gh api repos/prettier/prettier --jq ... confirmed the repo is public, unarchived, and on main
• gh issue list --repo prettier/prettier --label "help wanted" --state open --limit 3 --json number,title --jq "length" returned 3
• imported src/data/projects.js and confirmed the Prettier source count is 1 with the expected contributor link and avatar
• curl -L returned HTTP 200 for https://github.com/prettier/prettier/contribute
• curl -L returned HTTP 200 for https://avatars.githubusercontent.com/u/25822731?v=4
• git diff --check origin/main...HEAD && git diff --check
• GITHUB_TOKEN=$(gh auth token) pnpm build
• checked generated dist/index.html before restoring generated files; the Prettier card is present and the contributor link appears once

All passed. gh pr checks reports no hosted checks on this branch.

[Sean-Kenneth-Doherty]

Closing this to reduce maintainer review noise from my project-suggestion-only PR batch. I am pruning these so the queue can focus on concrete bug, security, accessibility, and performance fixes.