Release version 1.1.0 - Package quantity restriction feature

Added comprehensive package quantity restriction functionality that allows
limiting product purchases to predefined package sizes only.

Features:
- Global setting to enable package quantity restrictions
- Per-product override for quantity restrictions
- Automatic hiding of quantity input field when restricted
- Frontend validation with package selection UI
- Server-side cart validation
- User-friendly error messages
- Complete translations for all supported languages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,36 @@ All notable changes to WooCommerce Tier and Package Prices will be documented in
 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] - 2025-12-21
+
+### Added
+- Package quantity restriction feature
+- Global setting to restrict quantities to defined package sizes
+- Per-product setting to restrict quantities to defined package sizes
+- Frontend validation preventing non-package quantities
+- Server-side cart validation for package quantities
+- User-friendly error messages showing available package sizes
+- Automatic quantity field hiding when restriction is enabled
+- Package selection UI with highlighted states
+
+### Changed
+- Enhanced package pricing display template with restriction mode support
+- Improved JavaScript to handle restricted mode package selection
+- Updated frontend to show "Choose a package size below" notice in restricted mode
+
+### Technical
+- Added `validate_package_quantity()` method in WC_TPP_Cart class
+- Added `maybe_hide_quantity_input()` method in WC_TPP_Frontend class
+- Extended `woocommerce_add_to_cart_validation` filter hook
+- Added `wc-tpp-restricted-mode` CSS class for styling
+- New product meta: `_wc_tpp_restrict_to_packages`
+- New global option: `wc_tpp_restrict_package_quantities`
+
+### Translations
+- Added 7 new translatable strings
+- Updated all translations (en_US, de_DE, de_CH_informal)
+- Compiled all .mo files with new strings
+
 ## [1.0.2] - 2025-12-21
 
 ### Changed