Modernize pie charts: Replace C3 with Recharts, improve responsiveness, and add slice navigation (#535)

[Soumashree-Das]

Fixes #535

Tasks

• Reviewed
  contribution guidelines
• PR is descriptively titled and links the original issue above.
• Tests pass -- look for a green checkbox ✔️ a few minutes after opening
  your PR Run
  tests
  locally to check for errors.
• Commits are in a uniquely-named feature branch and have no merge conflicts
• Looked for possible updates in documentation and added updates where
  applicable
• Updated CHANGELOG.rst

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Description

This PR replaces the deprecated C3 charting library with the modern, responsive, and React-friendly Recharts library for all pie charts in ScanCode Workbench.

Recharts improves performance, handles congested labels better, and integrates cleanly with the v4 React renderer. As requested in Issue #535, this PR also adds optional slice-click support—allowing parent components to navigate to corresponding detail views when a user clicks on a pie slice.

Key Changes

• Removed all usage of C3 from the PieChart component.
• Implemented a new Recharts-based PieChart using <PieChart>, <Pie>, <Cell>, <Tooltip>, and <Legend>.
• Preserved existing color mapping through LEGEND_COLORS.
• Added an optional onSliceClick(sliceName) callback for interactive navigation.
• Cleaned and updated piechart.css: removed old .c3-* rules and added Recharts tooltip styles.
• Updated documentation to reference Recharts instead of C3.
• Updated CHANGELOG.rst accordingly.

Notes

This PR focuses specifically on replacing C3 pie charts and enabling slice interaction as described in #535. Other chart types can be updated in future enhancements if needed.