WIP: Enable dynamic AIS stream handling based on user location and map focus.

- Prevent AIS stream from starting immediately; start upon user interaction.
- Add `ais_stream_started` state for WebSocket management.
- Extend `useRealAISProvider` with `userLocationLoaded` and `mapFocused` to control stream.
- Update frontend components to handle geolocation and map focus.
- Exclude test files from compilation

Introduce WebSocket integration for AIS services

- Added WebSocket-based `useRealAISProvider` React hook for real-time AIS vessel data.
- Created various tests including unit, integration, and browser tests to validate WebSocket functionality.
- Added `ws` dependency to enable WebSocket communication.
- Implemented vessel data mapping and bounding box handling for dynamic updates.

test_websocket.js

@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+// Simple WebSocket test client for AIS data
+const WebSocket = require('ws');
+
+const ws = new WebSocket('ws://localhost:3000/ws');
+
+ws.on('open', function open() {
+    console.log('Connected to AIS WebSocket server');
+    
+    // Send a test message
+    ws.send('Hello from test client');
+});
+
+ws.on('message', function message(data) {
+    const message = data.toString();
+    
+    if (message.startsWith('Connected to AIS stream')) {
+        console.log('✓ Received connection confirmation:', message);
+    } else if (message.startsWith('Echo:')) {
+        console.log('✓ Received echo response:', message);
+    } else {
+        try {
+            const aisData = JSON.parse(message);
+            console.log('✓ Received AIS data:', {
+                mmsi: aisData.mmsi,
+                ship_name: aisData.ship_name,
+                latitude: aisData.latitude,
+                longitude: aisData.longitude,
+                timestamp: aisData.timestamp
+            });
+        } catch (e) {
+            console.log('✓ Received message:', message);
+        }
+    }
+});
+
+ws.on('error', function error(err) {
+    console.error('WebSocket error:', err);
+});
+
+ws.on('close', function close() {
+    console.log('WebSocket connection closed');
+});
+
+// Keep the script running for 30 seconds to receive some data
+setTimeout(() => {
+    console.log('Closing connection after 30 seconds...');
+    ws.close();
+    process.exit(0);
+}, 30000);