Enhancement: Add auto updater functionality for the app, redux toolkit, upgrade dependencies, cleanup and refactor code.

[rahulharpal1603]

Description

The current application lacks a streamlined onboarding experience, app update flow, and consistent UI/UX patterns. This issue tracks the implementation of a comprehensive onboarding process, update management interface, and frontend improvements aligned with modern standards.

Goals:

1. Onboarding Flow

• Implement a step-based onboarding system.
• Render dynamic onboarding components based on progress.
• Store and manage onboarding state using Redux.

2. Update Management

• Integrate update checking, downloading, and installation functionality.
• Add user-facing UI for displaying update status and progress.

3. UI Component Modernization

• Introduce and use global components made by ShadCN and theme provided by TweakCN:
  • Loader, Alert, Badge, Card, Scroll Area, Separator, Progress.
• Refactor and simplify:
  • Button, Input, Textarea, Dialog, Dropdown, Slider, Pagination.

4. Frontend Architecture Enhancements

• Upgrade major libraries:
  • React 19, Redux Toolkit, Tailwind CSS v4, Radix UI, Lucide icons.
• Improve theming system:
  • Light, Dark, and System modes with theme selector dropdown.
• Refine routing:
  • Nested layout routes
  • Centralized route constants for maintainability.