New Features #

• Conditional Item Display: Added a new parameter showAllItemsOnEmptyQuery to control whether all items are displayed when the search query is empty.
  • Default: true.
  • If set to false, the list is hidden when the query is empty.
• Empty Query Message: Added a parameter emptyQueryMessage to display a custom message when no items are shown due to an empty query.
  • Default: "No items found. Please type to search."

• Initial release of algorithmic_search package.
• Added SearchSheet widget for single and multi-select search functionality.
• Implemented SearchSheetController for managing selected items and notifying listeners.
• Added SearchSheetType enum to support singleSelect and multiSelect modes.
• Configurable properties:
  • showSelectedItems to display selected items at the top.
  • Customizable padding, spacing, and run spacing for item layout.
  • searchCriteria for filtering items based on search input.
  • itemBuilder for defining the appearance of each item.
• Example app included with usage of both single and multi-select modes.