Refactor (EOL)

[RomainLvr]

Transform Formcreator into EOL Migration Tool for GLPI 11

This PR transforms the Formcreator plugin into an End-of-Life (EOL) migration assistant for GLPI 11, providing administrators with clear guidance and tools to migrate from Formcreator to GLPI's native forms system.

Key Changes:

🔧 Core Transformation:

• Final EOL version (v3.0.0) - no future functional development
• Removed all functional Formcreator classes to prevent runtime conflicts
• Created stub classes to maintain compatibility during transition
• Updated PHPStan configuration for GLPI 11 compatibility (level 5, 0 errors)

📋 Migration Interface:

• New Twig-based EOL information pages with professional GLPI styling
• Migration status dashboard showing form/answer statistics
• CLI migration command instructions with copy-to-clipboard functionality
• Central dashboard EOL warning banner for administrators

Screenshots

Central warning:

EOL Infos:

Migration Status: