feat: Initialize Zastava Webhook service with TLS and Authority authentication

- Added Program.cs to set up the web application with Serilog for logging, health check endpoints, and a placeholder admission endpoint.
- Configured Kestrel server to use TLS 1.3 and handle client certificates appropriately.
- Created StellaOps.Zastava.Webhook.csproj with necessary dependencies including Serilog and Polly.
- Documented tasks in TASKS.md for the Zastava Webhook project, outlining current work and exit criteria for each task.

Mongo2Go-4.1.0/src/Mongo2Go/Helper/PortWatcher.cs

@@ -0,0 +1,38 @@
+using System.Linq;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+
+namespace Mongo2Go.Helper
+{
+    public class PortWatcher : IPortWatcher
+    {
+        public int FindOpenPort()
+        {
+            // Locate a free port on the local machine by binding a socket to
+            // an IPEndPoint using IPAddress.Any and port 0. The socket will
+            // select a free port.
+            int listeningPort = 0;
+            Socket portSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+            try
+            {
+                IPEndPoint socketEndPoint = new IPEndPoint(IPAddress.Any, 0);
+                portSocket.Bind(socketEndPoint);
+                socketEndPoint = (IPEndPoint)portSocket.LocalEndPoint;
+                listeningPort = socketEndPoint.Port;
+            }
+            finally
+            {
+                portSocket.Close();
+            }
+
+            return listeningPort;
+        }
+
+        public bool IsPortAvailable(int portNumber)
+        {
+            IPEndPoint[] tcpConnInfoArray = IPGlobalProperties.GetIPGlobalProperties().GetActiveTcpListeners();
+            return tcpConnInfoArray.All(endpoint => endpoint.Port != portNumber);
+        }
+    }
+}