app: build out /contributors with live good-first-issues

[joelpeace48-cell]

Problem

app/contributors/page.tsx is a placeholder, and the site map describes it as
"good first issues and guild roles". The three repositories now carry a labelled
issue backlog, and nothing surfaces it.

What to do

• Fetch open issues labelled good first issue and help wanted across all
  three repositories via the GitHub API.
• Group by repository, show labels and difficulty, link straight to the issue.
• Summarise the contribution workflow and link each repo's CONTRIBUTING.md.
• Link the Code of Conduct.
• Cache the response and degrade gracefully.

Acceptance criteria

• Live issues from all three repositories
• Grouped, labelled, and linked
• Contribution workflow and Code of Conduct linked
• Graceful degradation on API failure

Notes

Good first issue in its own right, and it compounds: it is the page that makes
every other good first issue findable.

[Surajaraikar]

Hey! I’d like to take this up. My approach would be to fetch the open good first issue and help wanted issues from the three repos using the GitHub API, group them by repo, and show the relevant labels/difficulty with direct issue links. I’d use Next.js caching for the responses and handle failures per repo so one failed request doesn’t break the whole page. I’ll also add the contribution guide and Code of Conduct links as mentioned in the issue. Happy to work on this if it’s still available!

[joelpeace48-cell]

HI @Surajaraikar , you're assigned, ensure all ci pipelines are green