Recently Deleted

[jasonlim131]

• [x] encode parent child relationship
• [x] implement recently deleted stack
• [ ] data object which reference config.json
• [ ] reorganize config.json to address these changes
• [ ] integrate Immer for stack integrit
• [ ] implement Redux global state management

Tests:

• [ ] deleting a column deletes all the children but ofc, saves it
• [ ] deleting a card does not delete the column
• [ ] The exact number of cards are retrieved by 'undo'
• [ ] serial deletion and undo
• [ ] serial undos followed by serial redos