[Feature] : Download Subscribers Data (Filtered & Full List)

[boatengjephthah27]

User Story

As an Admin/User,
I want a button to download subscriber data,
So that I can easily export and analyze subscriber information.

Additional Details/Context

• The download button should be available on the Subscribers page.
• If filters are applied, the downloaded data should reflect the filtered results only.
• If no filters are applied, the download should contain all subscribers.
• The data should be exported in CSV format with appropriate headers.
• Button placement: Above the subscribers list for easy access.
• Showing a confirmation/toast notification after the download starts.

Value Added

• Improved Data Accessibility: Users can export data for further processing or reports.
• Efficiency: Reduces the need for manual data entry or copying.
• Better Filtering Experience: Ensures users get only relevant data when needed.
• Standardized CSV Data Format

Acceptance Criteria

• A "Download CSV" button is available on the Subscribers page.
• When clicked without filters, all subscribers are exported in a CSV file.
• When clicked with filters applied, only the filtered results are exported.
• The exported CSV file has proper headers and correctly formatted data.
• A success notification appears after initiating the download.