chore: Update .gitignore and CHANGELOG.md for environment file synchronization feature and documentation improvements

Author: dev-kraken

.gitignore

@@ -7,3 +7,6 @@
 /.idea/
 *.swp
 *.swo
+*.env
+*.env.example
+.DS_Store

CHANGELOG.md

@@ -5,6 +5,72 @@ All notable changes to `env-validator` will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.0] - 2025-05-27
+
+### :bug: Fixed
+
+-   **Critical Fix**: Required field validation now works correctly with array rules in standalone PHP
+    -   Fixed `StandaloneValidator::isRequiredAndMissing()` to properly handle array rules like `['required', 'string']`
+    -   Previously only worked with string rules like `'required|string'`
+    -   Now both `['required', 'string']` and `'required|string'` formats work correctly
+    -   Ensures missing required environment variables are properly detected and reported
+
+### :art: Added
+
+-   **Environment File Synchronization System** - Complete solution for keeping `.env` and `.env.example` synchronized
+    -   **New Service**: `EnvExampleSyncService` with intelligent categorization and security features
+    -   **New Command**: `php artisan env:sync` with multiple options (`--check`, `--force`, `--no-values`, `--remove-extra`)
+    -   **New Facade**: `EnvSync` for programmatic usage in applications
+    -   **Standalone PHP Support**: Works seamlessly in non-Laravel applications with explicit path configuration
+    -   **Security Features**: Automatic sensitive data masking and smart example value generation
+    -   **28 comprehensive tests** covering all sync scenarios and edge cases
+-   **New Example File**: `examples/required_field_examples.php` - Comprehensive required field validation examples
+    -   Demonstrates different rule formats (array vs string)
+    -   Shows required vs optional field handling
+    -   Includes real-world production scenarios
+    -   Covers custom error messages for required fields
+    -   Best practices and troubleshooting guide
+-   **New Example File**: `examples/env_sync_examples.php` - Complete environment synchronization demonstrations
+    -   Shows real-world scenarios where developers add new environment variables
+    -   Demonstrates security features and sensitive data handling
+    -   Includes CI/CD integration examples and best practices
+    -   Covers programmatic usage and validation rule suggestions
+-   **New Example File**: `examples/standalone_env_sync_examples.php` - Standalone PHP environment synchronization
+    -   Comprehensive guide for using environment sync in non-Laravel applications
+    -   Demonstrates explicit path configuration and error handling
+    -   Shows integration with deployment scripts and validation workflows
+    -   Covers different project structures and best practices
+-   **New Test File**: `tests/Unit/ReadmeExamplesTest.php` - Comprehensive test coverage for README examples
+    -   Tests both basic (string rules) and advanced (Rule objects) standalone examples
+    -   Validates required field validation section examples work correctly
+    -   Ensures mixed required/optional field scenarios work as documented
+    -   Verifies custom error message functionality in standalone mode
+    -   Guarantees all README code examples are functional and accurate
+
+### :books: Improved
+
+-   **Enhanced Documentation**: Added comprehensive "Environment File Synchronization" section to README
+    -   Complete command reference with examples and sample outputs
+    -   **Standalone PHP Usage**: Detailed documentation for non-Laravel applications
+    -   Security features documentation with sensitive data handling
+    -   CI/CD integration examples and best practices
+    -   Programmatic usage with facade and service examples
+    -   Different project structure configurations and deployment script integration
+    -   Updated features list and package description to highlight sync capabilities
+-   **Enhanced Documentation**: Added dedicated "Required Field Validation" section to README
+    -   Clear examples of both array and string rule formats
+    -   Explanation of when required validation fails
+    -   Updated examples section with new file listings
+-   **Fixed README**: Corrected Standalone PHP Usage examples
+    -   Added missing `use` statements for Rule objects
+    -   Changed from `$validator->validate()` (Laravel) to `EnvValidator::validateStandalone()` (standalone)
+    -   Added both basic (string rules) and advanced (rule objects) examples
+    -   All examples now work correctly without fatal errors
+
+---
+
+[1.1.0]: https://github.com/dev-kraken/env-validator/releases/tag/v1.1.0
+
 ## [1.0.0] - 2025-05-26
 
 ### :rocket: Initial Release