Add source generator to generate ExecuteAsync overloads

RemoteExec.Client/LoadBalancingStrategies/LeastBacklogStrategy.cs

@@ -1,7 +1,11 @@
 namespace RemoteExec.Client.LoadBalancingStrategies;
 
+/// <summary>
+/// A load balancing strategy that selects servers based on local backlog.
+/// </summary>
 public class LeastBacklogStrategy : ILoadBalancingStrategy
 {
+    /// <inheritdoc/>
     public ServerConnection? SelectServer(IEnumerable<ServerConnection> availableServers)
     {
         return availableServers.MinBy(s => s.TaskChannel.Reader.Count);