Integrate Geographical Map for Layoff Data

[kyeongan]

Description: Add a map component that visualizes layoffs by region (country, state, city).

Acceptance Criteria:

Use a library like react-leaflet or react-map-gl to integrate a map.

Layoff data should be displayed as markers or bubbles on the map, with size/color representing the number of layoffs.

Add hover tooltips to show detailed information about each marker (e.g., company, number of layoffs, etc.).

Labels: enhancement, map, frontend