Update .gitignore to exclude TypeScript build info and add dist directory. Expand README with project overview, technology stack, prerequisites, and instructions for running and testing the application.

src/HSchool.Simulation/SimulationOptions.cs

@@ -0,0 +1,23 @@
+namespace HSchool.Simulation;
+
+/// <summary>Tunables of the authoritative simulation. Bound from the <c>Simulation</c> config section.</summary>
+public sealed class SimulationOptions
+{
+    public const string SectionName = "Simulation";
+
+    /// <summary>Fixed simulation steps per second.</summary>
+    public int TickRate { get; set; } = 20;
+
+    public float WorldWidth { get; set; } = 1600f;
+
+    public float WorldHeight { get; set; } = 900f;
+
+    public float PlayerSpeed { get; set; } = 260f;
+
+    public float PlayerRadius { get; set; } = 18f;
+
+    /// <summary>Length of one fixed step.</summary>
+    public float FixedDeltaTime => 1f / TickRate;
+
+    public TimeSpan TickInterval => TimeSpan.FromSeconds(1d / TickRate);
+}