added the recenter-route feature control file

[s4chinjha]

This Pr Closes #339 and adds a Recenter button to the map.

🛠️ Fixes Issue

As mentioned in issue #339, after Pr #336 disabled automatic map zooming, there was no way to return to the route once you pan or zoom away from it. So i wanted to add a simple control to recenter the map to the current route.

👨‍💻 Changes proposed

• Added the recenter-route button to the map as propose in the issue
• New button in the top-right MapLibre control group below Map Styles
• Used a crosshair icon with the tooltip "Recenter to route"
• Clicking the button fits the entire route back into view.
• Button is hidden when no route is present and reappears automatically when a route is loaded.

📄 Note to reviewers

• I have reused the bounds calculation, padding logic, and fitBounds call from the zoom effect in src/components/map/index.tsx.
• The button was not hiding after resetting waypoints (same root cause as issue Map zooms too agressively to route extents #326) which I fixed by checking successful from directionsStore instead of coordinates, since successful is set to false when clearRoutes() is called.

📷 Screenshots

A img just to show how it looks

[gisops-bot]

Preview is ready! 🚀 You can view it here: https://valhalla-app-tests.gis-ops.com/342