Merged PR 1969: Reward Shopping Cart Implementation with Navigation State Management and Shipping Address Integration

1. Reward Shopping Cart Implementation
  - New shopping cart with quantity control and availability checking
  - Responsive shopping cart item component with improved CSS styling
  - Shipping address integration in cart
  - Customer reward card and billing/shipping address components

  2. Navigation State Management Library (@isa/core/navigation)
  - New library with type-safe navigation context service (373 lines)
  - Navigation state service (287 lines) for temporary state between routes
  - Comprehensive test coverage (668 + 227 lines of tests)
  - Documentation (792 lines in README.md)
  - Replaces query parameters for passing temporary navigation context

  3. CRM Shipping Address Services
  - New ShippingAddressService with fetching and validation
  - CustomerShippingAddressResource and CustomerShippingAddressesResource
  - Zod schemas for data validation

  4. Additional Improvements
  - Enhanced searchbox accessibility with ARIA support
  - Availability data access rework for better fetching/mapping
  - Storybook tooltip variant support
  - Vitest JUnit and Cobertura reporting configuration

Related work items: #5382, #5383, #5384

docs/tech-stack.md

@@ -103,6 +103,41 @@
 - **[Storybook](https://storybook.js.org/)**
   - Isolated component development and living documentation environment.
 
+## Core Libraries
+
+### Navigation State Management
+
+- **`@isa/core/navigation`**
+  - Type-safe navigation state management through Angular Router state
+  - Provides clean abstraction for passing temporary state between routes
+  - Eliminates URL pollution from query parameters
+  - Platform-agnostic using Angular's Location service
+  - Full documentation: [libs/core/navigation/README.md](../libs/core/navigation/README.md)
+
+### Logging
+
+- **`@isa/core/logging`**
+  - Centralized logging service for application-wide logging
+  - Provides contextual information for debugging
+
+### Storage
+
+- **`@isa/core/storage`**
+  - Storage providers for state persistence
+  - Session and local storage abstractions
+
+### Tabs
+
+- **`@isa/core/tabs`**
+  - Tab management and navigation history tracking
+  - Persistent tab state across sessions
+
+### Configuration
+
+- **`@isa/core/config`**
+  - Application configuration management
+  - Environment-specific settings
+
 ## Domain Libraries
 
 ### Customer Relationship Management (CRM)