KiloFilter v2.1.0

v2.1.0: Major Release - Smart Duplicates & Hierarchical Organization

Features:
• Smart Duplicate Deletion: 3 intelligent strategies (Keep Newest, Keep Oldest, Keep Smallest)
• Real-time deletion preview with automatic space calculation
• Advanced search and filtering (filename + size range)
• Hierarchical file organization: Category → File Extension structure
• UI enhancements: Emojis on 22+ action buttons
• Complete localization in 6 languages (EN, ES, FR, DE, IT, JP)

Documentation:
• Updated CHANGELOG.md with v2.1.0 features
• Enhanced README.md with organization examples
• Complete RELEASE_NOTES.md rewrite
• Improved .gitignore with 8 organized sections
• Help content updated in all supported languages

Build:
• Standalone distribution (self-contained, ~155MB)
• Lightweight distribution (requires .NET 8, ~1MB)
• KiloFilter v2.1.0.zip package ready for release

KiloFilter v1.0.0

First official release of KiloFilter.