Move code to src folder

src/RemoteExec.Server/Configuration/AuthenticationConfiguration.cs

@@ -0,0 +1,12 @@
+namespace RemoteExec.Server.Configuration;
+
+/// <summary>
+/// Configuration for API key authentication.
+/// </summary>
+public class AuthenticationConfiguration
+{
+    /// <summary>
+    /// Gets or sets the list of configured API keys.
+    /// </summary>
+    public List<ApiKeyConfiguration> ApiKeys { get; set; } = [];
+}