v1.2.3

🎮 README Redesign & Installer UI Overhaul

Changed

• Complete README redesign with gamification theme (all 5 languages)
• RPG-style skill trees, quests, and engaging copy
• New badges (for-the-badge style, downloads count)
• Installer UI overhaul with beautiful ANSI styling
• Better selection prompts with visual indicators

Fixed

• POSIX compatibility for lowercase conversion (fixes macOS Bash 3.2 error)

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Full Changelog: v1.2.2...v1.2.3