[FEATURE]: Implement onboarding UI files and navigation to screens

[4555jan]

Feature and its Use Cases

week-3 implementation of ui onboard screens , account setup , friends detail screen invite screens , expense screen etc
Implement the onboarding UI screens and supporting components for the app.

Use cases

• The onboarding flow improves user experience and first impressions.
• The UI follows the project's design guidelines and structure.

Additional Context

• Added onboarding screens
• • Integrated the onboarding flow with home screen

Code of Conduct

• I have joined the Discord server and will post updates there
• I have searched existing issues to avoid duplicates