[US 02.03.01] Select and delete selected items

[Sami-Jagirdar]

Summary

• Changed the layout of the home fragment to allow for selecting and deleting items
• Added a boolean attribute to class Item that indicates if an item is selected or not
• Similarly added attributes and modified the class 'ItemAdapter' to indicate if the items are in select state or not
• Implemented delete functionality in HomeFragment to delete items when the item list is in select state and items are selected
• Also includes ability to cancel all selections and go back to regular state

UML
To be added here

*Note: I made the delete and tags button part of the home fragment and not the bottom navigation bar since that bar is meant for navigating between fragments, so adding something like a delete button wouldn't make sense. We can discuss the UI changes here