feature/Initial v0.1.0 Release

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project 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).
+
+## [0.1.0] - 2025-11-29
+
+### Added
+
+- Initial release of GitLab Groups Terraform module
+- Complete GitLab group resource configuration with all available attributes
+- Comprehensive input variable definitions with validation
+- Advanced security features support:
+  - Two-factor authentication enforcement
+  - IP restriction ranges for access control
+  - Push rules with commit validation
+  - Default branch protection settings
+- Access control and permission management:
+  - Project and subgroup creation level controls
+  - Membership and sharing restrictions
+  - Forking prevention controls
+- CI/CD integration features:
+  - Shared runners configuration
+  - Minutes limits management
+  - Auto DevOps support
+- Communication and notification controls:
+  - Email domain restrictions
+  - Notification settings
+  - Wiki access level configuration
+- Organizational structure support:
+  - Nested groups (parent-child relationships)
+  - Visibility level management
+  - Avatar configuration
+- Comprehensive output values:
+  - Basic group information
+  - Structured outputs for easy integration
+  - Convenience outputs for common use cases
+- Input validation for all variables:
+  - Path validation with regex patterns
+  - Access level validation
+  - Numeric constraint validation
+  - Email domain validation
+- Complete documentation:
+  - Usage examples (basic, advanced, enterprise)
+  - Input/output reference tables
+  - Security considerations
+  - Contributing guidelines
+- Example configurations:
+  - Simple setup for basic usage
+  - Complete setup with advanced features
+  - Automated setup script
+  - Variable examples with documentation
+- Terraform version constraints:
+  - Terraform >= 1.3.0
+  - GitLab provider ~> 18.0
+
+### Technical Details
+
+- **Provider Support**: GitLab provider v18.0+ for full feature compatibility
+- **Terraform Compatibility**: Requires Terraform 1.3.0 or higher
+- **Module Structure**: Follows Terraform module best practices
+- **Validation**: Comprehensive input validation to prevent configuration errors
+- **Documentation**: Complete API reference and usage examples
+
+[0.1.0]: https://github.com/SUDO-Terraform-Modules/gitlab-groups/releases/tag/v0.1.0