Release version 1.1.7 - Enhanced user experience features

Added three new customer-facing features to improve product page interaction
and tier pricing functionality.

Features:
- Optional text labels for tier pricing (similar to package labels)
- Clickable tier pricing table rows to auto-populate quantity field
- Add to Cart button auto-disables when quantity is 0 or less

Enhanced User Experience:
- Tier pricing rows now clickable with cursor pointer and hover animation
- Clicking tier row sets quantity and smoothly scrolls to quantity field
- Add to Cart button shows disabled state with reduced opacity
- Tier labels display below quantity in italic gray text

Technical Changes:
- Added optional 'label' field to tier pricing admin meta box
- Updated tier save logic to include label field (sanitized)
- Enhanced tier pricing frontend template to display labels
- Added click handler for tier pricing rows in frontend.js
- Added updateAddToCartButton() function to manage button state
- CSS: .wc-tpp-tier-label styling for tier labels
- CSS: Clickable cursor and hover transform for tier rows
- CSS: Disabled button styling (.single_add_to_cart_button:disabled)

Updated Files:
- templates/admin/tier-row.twig (added label field)
- includes/class-wc-tpp-product-meta.php (save label, template update)
- templates/frontend/tier-pricing-table.twig (display labels)
- assets/js/frontend.js (tier row clicks, button disable logic)
- assets/css/frontend.css (tier label style, clickable rows, disabled button)
- wc-tier-and-package-prices.php (version 1.1.7)
- composer.json (version 1.1.7)
- CHANGELOG.md (v1.1.7 section)

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

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

assets/css/frontend.css

@@ -50,11 +50,13 @@
 
 .wc-tpp-table tbody tr {
     border-bottom: 1px solid #e0e0e0;
-    transition: background-color 0.2s;
+    transition: all 0.2s;
+    cursor: pointer;
 }
 
 .wc-tpp-table tbody tr:hover {
     background: #f5f5f5;
+    transform: translateX(2px);
 }
 
 .wc-tpp-table tbody tr.wc-tpp-active-tier {
@@ -67,6 +69,14 @@
     font-size: 0.95em;
 }
 
+.wc-tpp-tier-label {
+    display: inline-block;
+    margin-top: 4px;
+    color: #666;
+    font-style: italic;
+    font-size: 0.9em;
+}
+
 /* Package pricing */
 .wc-tpp-packages {
     display: grid;
@@ -209,6 +219,14 @@ a.wc-tpp-view-options:hover {
     font-size: 0.95em;
 }
 
+/* Disabled add to cart button */
+.single_add_to_cart_button.disabled,
+.single_add_to_cart_button:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+    pointer-events: none;
+}
+
 /* Responsive design */
 @media (max-width: 768px) {
     .wc-tpp-packages {