Update WebSocket configuration and enhance logging in WalletWebSocketService

- Modified WebSocket configuration to allow enabling/disabling via environment variable, improving flexibility.
- Enhanced logging in WalletWebSocketService to provide clearer messages during reconnection attempts and notify users of WebSocket issues.

These changes improve the configurability and user experience of the wallet's WebSocket interactions.

src/app.config.ts

@@ -76,7 +76,7 @@ export const appConfig: AppConfig = {
           baseUrl: import.meta.env.VITE_LNBITS_BASE_URL || 'http://localhost:5000'
         },
         websocket: {
-          enabled: true,
+          enabled: import.meta.env.VITE_WEBSOCKET_ENABLED !== 'false', // Can be disabled via env var
           reconnectDelay: 1000, // 1 second
           maxReconnectAttempts: 5
         }