Enhance Theme Management with New Theme Manager Component

[yashdev16]

Overview:
This pull request enhances the theme management functionality by introducing a new ThemeManager component along with associated components such as TypographySelector and `ColorPick

Changes:

• Added ThemeManager.tsx to manage theme settings including typography and color schemes.
• Created TypographySelector.tsx for selecting typography settings.
• Developed ColorPicker.tsx for picking color schemes.
• Integrated ThemeManager into the admin dashboard at /admin/theme-manager.

Details:

• The Theme Manager component provides a user interface for administrators to configure and save theme settings.
• Settings are saved to local storage and can be integrated with an API for persistent storage.
• This update improves the user experience by allowing easy customization of the application's appearance.

Testing:

• Verified the integration of the Theme Manager component into the admin dashboard.
• Tested the functionality of typography and color selection.

Additional Notes:

• Ensure to navigate to /admin/theme-manager to access the new theme management interface.
• Future enhancements may include additional theme customization options and integration with backend services.

Tried my best to resolve this issue.