Replay client (#15001)

Content.Replay/Program.cs

@@ -0,0 +1,19 @@
+using Robust.Client;
+
+namespace Content.Replay;
+
+internal static class Program
+{
+    public static void Main(string[] args)
+    {
+        ContentStart.StartLibrary(args, new GameControllerOptions()
+        {
+            Sandboxing = true,
+            ContentModulePrefix = "Content.",
+            ContentBuildDirectory = "Content.Replay",
+            DefaultWindowTitle = "SS14 Replay",
+            UserDataDirectoryName = "Space Station 14",
+            ConfigFileName = "replay.toml"
+        });
+    }
+}