Improve code structure

- Add separate API project
- Add notification system

HyperbolicDownloaderApi/Networking/NetworkSocket.cs

@@ -0,0 +1,15 @@
+namespace HyperbolicDownloaderApi.Networking;
+
+public class NetworkSocket
+{
+    public string IPAddress { get; set; }
+    public int Port { get; set; }
+    public DateTime LastActive { get; set; }
+
+    public NetworkSocket(string ipAddress, int port, DateTime lastActive)
+    {
+        IPAddress = ipAddress;
+        Port = port;
+        LastActive = lastActive;
+    }
+}