Add Tab Bars to Events(Sports) and Depts. in the Navigation Bar

[ShubhKanodia]

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Issue: Add Tab Bars to Each Page in the Navigation Bar
description: The PES Buzz app currently uses a basic navigation structure for the "Trendy," "Sports," and "Department" pages. To enhance user navigation, this issue involves adding tab bars to each page. The tab bars will allow users to switch between different categories on each page for improved organization and a more user-friendly experience.

Tasks:

• Implement tab bar widgets for the "Events" and "Department" pages.
• Configure each tab bar to connect to the respective data sources for the selected category.
• Update the UI on each page to display news items based on the selected tab.
• Ensure that the tab bars provide a smooth and user-friendly navigation experience.
  Acceptance criteria:
• Each page within the app features a tab bar that allows users to navigate between different categories.
• The tab bars are connected to the relevant data sources, ensuring accurate content display.
• Users can easily switch between categories on each page, and the app provides a smooth and user-friendly tab bar experience.

Definition of done

• The tab bar implementation is clean, well-documented, and adheres to Flutter best practices.
• The tab bars are tested and function correctly.
• The issue is reviewed and accepted for implementation.

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This issue focuses on improving the navigation experience in the PES Buzz app by introducing tab bars on each page, allowing users to easily switch between different news categories.