[feature] Update Map UI to Dynamically Reflect Device Movement

[dee077]

Feature Description

Update the frontend map to reflect real-time device movement by listening to the location WebSocket stream. The device marker should update its position when new data arrives.

Appraoch

• Use ReconnectingWebSocket (as used in OpenWISP notifications and controller modules) to subscribe to the newly created endpoint.
• On receiving location updates, move the marker with a transition animation.