Release v0.1.9

Update UI (#12)

* feat: Add item administration features including item list, new item creation, and ingredient selection

- Implemented ItemAdminListPage for listing items with navigation to create new items.
- Created NewItemPage for item creation with a form for item details and validation.
- Added SelectIngredientsPage for selecting ingredients with search functionality.
- Introduced CurrentStep provider to manage the step in the item creation process.
- Developed NewItemForm provider to handle form state and ingredient management.
- Implemented SelectedIngredients provider to track selected ingredients and their quantities.
- Created IngredientCard widget for displaying ingredients with selection capabilities.
- Updated ingredient provider to include an update ingredient method.
- Enhanced routing to include new item administration pages.
- Updated sidebar to navigate to item administration.
- Added new dependencies for improved functionality.

* feat: Enhance item administration with search functionality and improved UI elements

* fix: Update color opacity methods for consistency in item administration UI