Update README.md to include project description, developer documentation links, and license information.

src/MrGameEng.Core/GameHostOptions.cs

@@ -0,0 +1,34 @@
+using Microsoft.Xna.Framework;
+
+namespace MrGameEng.Core;
+
+/// <summary>Window and loop settings for <see cref="GameHost"/>.</summary>
+public sealed class GameHostOptions
+{
+    /// <summary>Window title.</summary>
+    public string Title { get; set; } = "MrGameEng";
+
+    /// <summary>Backbuffer width in pixels.</summary>
+    public int Width { get; set; } = 1280;
+
+    /// <summary>Backbuffer height in pixels.</summary>
+    public int Height { get; set; } = 720;
+
+    /// <summary>Borderless fullscreen instead of a window.</summary>
+    public bool Fullscreen { get; set; }
+
+    /// <summary>Synchronize presentation with the display's vertical retrace.</summary>
+    public bool VSync { get; set; } = true;
+
+    /// <summary>Run updates on a fixed timestep (<see cref="TargetFps"/>) instead of as fast as possible.</summary>
+    public bool FixedTimeStep { get; set; }
+
+    /// <summary>Target update rate when <see cref="FixedTimeStep"/> is enabled.</summary>
+    public int TargetFps { get; set; } = 60;
+
+    /// <summary>Color the backbuffer is cleared to each frame.</summary>
+    public Color ClearColor { get; set; } = Color.CornflowerBlue;
+
+    /// <summary>Allow the user to resize the window.</summary>
+    public bool AllowResizing { get; set; } = true;
+}