• Added description? property to ListAccessibilityAttributes.growingButton
• Added getter method: Implemented growingButtonAriaDescribedBy() that returns the description element ID when description is provided
• Updated template: Added aria-describedby attribute and conditional hidden span with ui5-hidden-text class
• Added Cypress test
• Added test sample in List.html for manual verification

Example Usage:

list.accessibilityAttributes = {
  growingButton: {
    name: "Load more products",
    description: "This will load additional items from the catalog"
  }
};

Fixes: #12443