feat: add Panelio template

[Vellis59]

Panelio — Self-hosted services dashboard with admin UI

Panelio is a self-hosted services dashboard forked from Homepage with a built-in admin UI. It adds a full web-based configuration interface — manage services, bookmarks, widgets and settings from your browser, no more editing YAML files by hand.

Features

• Visual admin panel for services, bookmarks, widgets and settings
• Live preview, import/export
• Password-protected admin, no database required
• Docker image on ghcr.io

Files added

• templates/panelio/meta.yaml — template metadata
• templates/panelio/index.ts — deployment config
• templates/panelio/logo.svg — logo

Notes

• Uses official image: ghcr.io/vellis59/panelio:1.0.0
• Live demo available at https://demo-panelio.vellis.cc
• Build passes: npm run build ✅

🧪 Demo: https://demo-panelio.vellis.cc (password: demo)

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[Ahson-Shaikh]

You have made changes to the 75 templates along your new template. Please fix it and only add your changes.

[Vellis59]

Closing in favor of #1342 , this PR had unrelated file changes due to fork sync issues. The new PR contains only the Panelio template files.