feat: Enhance RelayHub component with subscription count details (still not working)

- Update RelayHubStatus.vue to display both local and global subscription counts, improving user visibility into active subscriptions.
- Add totalSubscriptionCount computed property in useRelayHub.ts to track the total number of subscriptions.
- Implement totalSubscriptionCount getter in relayHub.ts to return the size of the subscriptions map.
- Include debug logging in relayHub.ts for connected relay counts and statuses to aid in troubleshooting.

src/lib/utils/formatting.ts

@@ -78,3 +78,4 @@ export function formatWalletBalance(balanceMsat: number, locale: string = 'en-US
   }
   return formatMsats(balanceMsat, locale)
 }
+