Implement player PoC (#7)

src/Recordingtest.Player/Program.cs

@@ -0,0 +1,72 @@
+using Recordingtest.Player;
+using Recordingtest.Player.Model;
+
+string? scenarioPath = null;
+string outputDir = Path.Combine(Directory.GetCurrentDirectory(), "player-output");
+bool noLaunch = false;
+
+for (int i = 0; i < args.Length; i++)
+{
+    switch (args[i])
+    {
+        case "--scenario":
+            scenarioPath = args[++i];
+            break;
+        case "--output-dir":
+            outputDir = args[++i];
+            break;
+        case "--no-launch":
+            noLaunch = true;
+            break;
+    }
+}
+
+if (scenarioPath is null)
+{
+    Console.Error.WriteLine("usage: Recordingtest.Player --scenario <path> [--output-dir <path>] [--no-launch]");
+    return 2;
+}
+
+Scenario scenario;
+try
+{
+    scenario = ScenarioLoader.LoadFromFile(scenarioPath);
+}
+catch (Exception ex)
+{
+    Console.Error.WriteLine($"failed to load scenario: {ex.Message}");
+    return 3;
+}
+
+var stamp = DateTime.UtcNow.ToString("yyyyMMdd-HHmmss");
+var artifactDir = Path.Combine(outputDir, "artifacts", scenario.Name, stamp);
+Directory.CreateDirectory(artifactDir);
+
+FlaUI.Core.Application? app = null;
+if (noLaunch)
+{
+    app = UiaPlayerHost.AttachByExeName(scenario.Sut.Exe);
+    if (app is null)
+    {
+        Console.Error.WriteLine($"--no-launch: SUT '{scenario.Sut.Exe}' not running. artifact_dir={artifactDir}");
+        return 4;
+    }
+}
+else
+{
+    Console.Error.WriteLine("launching SUT is disabled in this PoC sandbox; pass --no-launch.");
+    return 5;
+}
+
+using var host = new UiaPlayerHost(app, artifactDir);
+var engine = new PlayerEngine();
+try
+{
+    engine.Run(scenario, host);
+    return 0;
+}
+catch (Exception ex)
+{
+    Console.Error.WriteLine($"player failed: {ex.Message} artifact_dir={artifactDir}");
+    return 1;
+}