Major Account management updated, Functionality for addition, and deletion.

[adityashibu]

This pull request includes several changes to the backend and frontend of the application, focusing on user management and device allocation. The most important changes include adding user deletion functionality, integrating device data into user management, and updating the frontend to handle user deletions.

Backend Changes:

• Added a new endpoint to delete users (delete_user) in backend/fastAPI.py.
• Integrated device data into user management by loading devices from devices.json and allocating them to users in backend/users.py. [1] [2] [3] [4]
• Added a function to create a JSON file with the selected user's allocated devices in backend/users.py.

Frontend Changes:

• Updated the Users component to handle user deletions, including state management and API calls in frontend/src/app/users/page.jsx. [1] [2]
• Added a confirmation dialog for user deletions in frontend/src/app/users/page.jsx.

Database Changes:

• Updated users_db.json to include additional users and devices. [1] [2]