chore: remove chandeleer from contributors page and art page

[NiHaiden]

Per request, Chandeleer, the artist behind of all the amazing Aurora artwork, has been removed from the artist file and from the art page. The request was voiced over Discord in a private conversation.

[Copilot]

Pull request overview

This PR removes references to the artist “Chandeleer” across the site’s contributor and art-related data and UI, aligning the public-facing pages with the removal request.

Changes:

• Removed the Chandeleer entry from data/contributors.json and data/art.json.
• Removed per-artwork artist attribution for affected art items and made the artist field optional in the art gallery page to avoid runtime errors.
• Removed/updated UI text that previously credited Chandeleer (footer credit line and OpenGraph image alt text).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
data/contributors.json	Removes Chandeleer from the contributors/artist list.
data/art.json	Removes the Chandeleer artist record and strips artist attribution from artworks.
components/footer/Footer.tsx	Removes the footer credit line pointing to Chandeleer.
app/[locale]/layout.tsx	Updates OpenGraph image alt text to remove Chandeleer attribution.
app/[locale]/art/page.tsx	Makes artist optional and guards the “by artist / sponsor” UI to handle missing artist data safely.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Metrics 0 duplication

Metric	Results
Duplication	0

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}