[FEATURE]: Implement Bulk Export of Security Findings (CSV/JSON)

[Rafiaminhaj]

Feature Description

Currently, users can only view security findings on the Findings.tsx page. Proposing to add checkbox selection controls to export selected (or all) findings as CSV/JSON format.

Proposed Implementation Plan

1. Checkbox Selection controls:
   • Add a column of checkboxes to the findings table with a "select all" toggle.
2. Bulk Export button:
   • Render a dropdown button showing "Export as CSV" and "Export as JSON" when items are selected.
3. CSV/JSON Serialization:
   • Implement frontend serializing utility to package the selected findings details and download them as files.

[Rafiaminhaj]

/assign gssoc