feat: Add Filament Themer Luncher plugin

[AlizHarb]

Overview

This PR adds the Filament Themer Luncher plugin to the Filament marketplace. This plugin provides a comprehensive UI and suite of tools for managing themes within Filament, powered by the alizharb/laravel-themer engine.

✨ Features

• Theme Discovery & Management: Easily scan for and toggle themes directly from the admin panel.
• Backup & Recovery: Built-in functionality to create and restore theme backups.
• Developer Tools: Widgets and infolists specifically designed for clear theme status tracking.
• Multilingual Support: Fully localized in 11 languages.
• Premium Aesthetics: Designed to feel native to Filament with professional, glassmorphic UI elements.

📦 Package Information

• Repository: AlizHarb/filament-themer-luncher
• Composer: alizharb/filament-themer-luncher
• License: MIT

✅ Checklist

• Documentation added in content/plugins/
• High-resolution banner added in content/plugins/images/
• Correct naming conventions followed (alizharb-themer-luncher)

[saade]

You're already have a PR open for Modular Luncher, please close the other one and address the issues here, or remove it from this PR.

[AlizHarb]

You're already have a PR open for Modular Luncher, please close the other one and address the issues here, or remove it from this PR.

Thanks for pointing that out! I've replaced the stretched image with a corrected version. The update has been pushed to the branch and closed the other PR.