Bring back CHANGELOG.md

Author: renatillas

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [Unreleased]
+
+### Added
+
+- Comprehensive test coverage for all public functions (40 tests total)
+
+### Fixed
+
+- **BREAKING**: Fixed `translations_from_nested_json()` - Now properly handles deeply nested JSON structures
+- **BREAKING**: Fixed ordinal suffix logic - `ordinal_suffix()` now includes position in output
+- Improved nested JSON conversion using `decode.recursive` for better performance
+
+### Changed
+
+## [2.0.0] - 2025-09-07
+
+### Changed
+
+- **BREAKING**: Major refactor and code reorganization
+- Moved locale functions to separate `g18n/locale` module
+- Cleaned up internal module structure
+- Removed unnecessary internal files and dependencies
+
+### Fixed
+
+- Various bug fixes and performance improvements
+
+## [1.1.0] - 2025-09-06
+
+### Added
+
+- **RTL/LTR Text Direction Support**: Added `TextDirection` type, `get_text_direction()`, `is_rtl()`, `get_css_direction()`
+- **Locale Negotiation System**: Added `negotiate_locale()`, `parse_accept_language()`, `get_locale_quality_score()`
+- **Complete Pluralization Coverage**: Added plural rules for 12 languages (Spanish, French, German, Italian, Arabic, Chinese, Japanese, Korean, Hindi)
+- **Context-Sensitive Translations**: Added `TranslationContext` type, `translate_with_context()`, `add_context_translation()`
+- **Advanced Translation Features**: Number formatting, date/time formatting, validation tools
+- **CLI Code Generation**: Command-line tool for generating Gleam modules from JSON translation files
+
+### Changed
+
+- Expanded pluralization from 3/12 to 12/12 supported languages
+- Enhanced locale support with comprehensive CLDR-based plural rules
+
+## [1.0.0] - 2025-09-06
+
+### Added
+
+- Initial release of g18n internationalization library
+- Core translation functionality with key-value lookups
+- Parameter substitution in translation templates
+- Basic pluralization support for English, Polish, and Russian
+- Trie-based translation storage for efficient lookups
+- JSON import/export functionality
+- Locale creation and management
+- Basic date/time formatting
+- Comprehensive test suite and documentation