feat: add geolocation map component

[stdavis]

Closes #218

This is not exactly the same implementation as bikeways. The web component has different functionality. But for atlas, I wonder if it's good enough.

[Copilot]

Pull Request Overview

This PR adds a geolocation map component to the application by integrating ArcGIS Map Components. The implementation provides users with a locate button that allows them to find their current position on the map.

• Adds ArcGIS Map Components dependency and styling
• Integrates an arcgis-locate component into the map interface
• Updates ArcGIS core library to a newer version

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated 2 comments.

File	Description
package.json	Adds @arcgis/map-components dependency and updates @arcgis/core version
src/main.tsx	Imports required CSS for map components styling
src/components/MapContainer.tsx	Implements the locate component with proper map integration

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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