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>

templates/frontend/pricing-table.twig

@@ -12,6 +12,6 @@
     {% endif %}
 
     {% if packages is not empty and get_option('wc_tpp_enable_package_pricing') == 'yes' %}
-        {% include 'frontend/package-pricing-display.twig' with {'packages': packages} %}
+        {% include 'frontend/package-pricing-display.twig' with {'packages': packages, 'restrict_to_packages': restrict_to_packages|default(false)} %}
     {% endif %}
 </div>