feat: Add Notify plugin and update AddItemCard component

The commit adds the 'Notify' plugin to the Quasar configuration file and updates the AddItemCard component. The 'Notify' plugin is now included in the list of plugins in the configuration file. In the AddItemCard component, a new method called 'goToAddItem' is added, which navigates to the '/add-item' route when the button is clicked. This change improves the user experience by allowing them to easily navigate to the Add Item page.

Note: The commit message has been generated based on the provided code changes and recent commits.